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Cooling tower maintenance

Cooling Tower Maintenance

Cooling Tower Maintenance, Engineering Repairs & Servicing

Cooling tower maintenance

Expert cooling tower maintenance and engineering support.

Water Treatment Services is a leading UK water and environmental engineering services company offering expert cooling tower maintenance, engineering repairs and refurbishment solutions for all industrial and commercial cooling systems, towers and evaporative condensers.

Our cooling tower engineering and on-going service contracts are carried out by experienced specialists trained to deliver a comprehensive range of services.

Operating throughout the UK and Ireland our water treatment and engineering solutions have been developed to optimise thermal performance, improve reliability, extend asset life-cycles and ensure client safety and regulatory compliance obligations are fulfilled.

Cooling tower maintenance and engineering support solutions

Our water cooling tower maintenance, engineering repair and refurbishment solutions offer a number of important benefits including:

  • Cooling Tower Experts

    Engineering specialists trained to deliver a comprehensive range of cooling tower maintenance, repair and refurbishment solutions to optimise thermal performance, improve reliability, and extend asset life-cycles on all types of towers.

  • Comprehensive Service Plans

    Comprehensive service plans and technical support to ensure cooling towers operate efficiently and comply mechanically, chemically and microbiologically with the Health & Safety Executives ACOP L8 and HSG274 Part 1.

  • Energy Efficiency Optimisation

    Expert investigation and analysis to optimise thermal performance and energy efficiency of cooling towers, cooling systems, HVAC and heat transfer processes.

  • Regulatory Compliance Support

    Full cooling system compliance solutions to meet the legal standards set by the Health & Safety Executive in their ACOP L8 and HSG274 Part 1.

  • Water Treatment Servicing

    Comprehensive cooling tower water treatment service plans using the latest high performance technologies, water softeners and control equipment … cooling water treatment →

  • Monitoring & Validation

    Latest water analysis equipment to monitor and validate cooling system treatment programme performance.

  • Laboratory Water Testing

    Laboratory testing for Legionella bacteria, other waterborne pathogens and a range of chemical parameters to ensure your monitoring programmes are accurate and relevant … legionella testing →

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians and specialist engineers, we can offer comprehensive cooling tower maintenance, repair and engineering solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our engineering and water treatment solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

How do cooling towers work?

Cooling towers and evaporative condensers are used in a wide variety of commercial, industrial and process applications. They are designed to transfer heat away from a manufacturing or industrial process or an internal environment as efficiently as possible and then disperse that unwanted heat energy in to the atmosphere. Cooling towers do this either by allowing the water used as part of its cooling system to evaporate, thereby releasing energy, or by using air to cool the working liquids.

Where are cooling towers used?

Cooling towers and evaporative condensers are typically found in power stations, petrochemical plants, oil refineries, data centres, hotels, offices and other commercial buildings and manufacturing facilities. The size of the towers varies hugely, from small compact units which sit on the roof of an office or factory to huge, free-standing hyperboloid towers typical of power stations, which can be up to 200 metres high.

Hyperboloid cooling towers

Large concrete hyperboloid cooling towers.

Maintaining thermal performance and reliability

As with any structure or item of plant or machinery in a factory or business, cooling towers should be inspected regularly to ensure that they continue to perform in the way intended. Deteriorating components and equipment can soon start to impact on how efficiently your factory processes or business is operating, and a cooling tower which has totally failed could shut down production entirely.

Legionella control and ACOP L8 compliance

Another significant consideration that must be fully addressed is the health and safety dangers posed by dirty and poorly managed cooling towers. Towers and evaporative cooling systems have been implicated in several significant outbreaks of Legionnaires’ disease, a serious, potentially fatal lung condition. They are considered high risk by the Health & Safety Executive and special precautions need to be taken.

Because of this there are strict tower registration and legionella control requirements in place designed to protect the safety of employees and others and these must be followed. Failure to do so could have serious consequences and may lead to prosecution and significant fines for owners and operators of cooling towers.

Expert cooling tower inspections

The experienced and skilled engineers at Water Treatment Services can be called on to inspect, maintain and service your cooling towers, whether on an on-going basis, to pick up on any issues which could develop into a major problem, or because a situation has occurred which has required the towers to be shut down.

During a cooling tower inspection, our engineers will look at the integrity of the tower structure as a whole, they will also examine the internal components and cooling water systems and how these are treated. Additionally they will review the overall performance and heat transfer efficiencies of the tower to ensure it is operating safely and effectively.

Our engineers typically take photographs as part of the initial inspection process, and feedback all results to the client in a comprehensive written report. The client can then use this information to target where they should be concentrating repairs, or highlight any areas in the cooling tower which are a cause for concern and require further action.

Why is cooling tower maintenance important?

Cooling towers are there to do one job only – provide cooling. Should your cooling tower fail because of poor maintenance, then the entire business operation could be compromised, especially if the cooling is critical to a manufacturing process or required to provide environmental temperature control.

Regular cooling tower maintenance will also improve operational efficiencies and prolong the lifespan of your towers, avoiding the need for a costly replacement until absolutely necessary.

Effective tower maintenance procedures will also minimise the risks of bacteria growing in the cooling water systems. Legionella, the bacteria responsible for the potentially deadly respiratory condition, Legionnaires’ disease is often linked with water cooling towers which are considered a high legionella risk. Legionnaires’ disease can be fatal, and companies which have or operate cooling towers on their premises have a legal obligation to register them with their local council, and to monitor and maintain their cooling towers to protect public health.

How to register cooling towers with your local council

Under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, if your building or site uses a cooling tower or evaporative condenser you need to write to your local council to tell them about it. The only exceptions to this are when the tower contains no water that’s exposed to the air, or the water or electrical supplies have been disconnected. Additionally, if you make any changes to the tower you also need to write to your council straight away.

What are the legionella laws for cooling towers?

Cooling towers and evaporative cooling systems have been implicated in a number of serious outbreaks of Legionnaires’ disease and are considered by the Health & Safety Executive to be high risk. To control the risks from Legionella bacteria tower owners and operators must assess the risks posed and implement suitable precautions to protect employees and others from harm. The HSE’s Approved Code of Practice ACOP L8 and their supporting health and safety guidance document HSG274 Part 1 provides clear instruction and advice on what measures need to be taken. Both documents are essential reading for any duty holder, responsible person, owner or operator of a cooling tower.

Maintaining energy efficiency and optimising costs

In addition to the important public health aspects, studies have shown that a water cooling tower which is poorly maintained can become energy inefficient, costing you money. Energy costs rise by approximately 5% to 6% for every degree Celsius more in temperature. Therefore, keeping up with a maintenance programme on your cooling towers could save around 15% in your annual energy costs, partially offsetting the cost of doing the maintenance in the first place.

What does cooling tower maintenance and servicing involve?

The first step in any good cooling tower maintenance and servicing programme is to take stock of what type of cooling towers you have, how large they are, how old they are, system volumes, cooling loads, general cleanliness and a whole host of other factors.

There is no one “correct” maintenance regime for a cooling tower, and each business will have to develop their own maintenance procedures based on their specific circumstances. There are however some standard elements which usually form part of any cooling tower maintenance schedule.

First, our cooling tower engineering specialists will take an overview of the cooling units as a whole, looking for any obvious issues which might have arisen since the last inspection. Before taking a closer look at the tower, safe access must be provided and everything must be switched off and disconnected to ensure the safety of the maintenance team.

The team can then clear away any debris which has accumulated in the filters and tower pack, check for cracks and splits and look for moss, slimes and the build-up of scale. Once these visual inspections are complete, the team can then move onto checking the water supply level, flow control valves and filters, gear box and the performance of moving parts such as shaft bearings and fans; look for problems with tension and check oil levels if appropriate.

The frequency of maintenance will often depend on the type of cooling tower and how often it is used, but in many operations it is typically carried out quarterly. Record keeping is also an essential part of the maintenance process and noting down exactly what was done and when can keep you on the right side of the law when it comes to health and safety legislation, and in particular the control of Legionella bacteria and compliance with the HSE’s ACOP L8.

Water testing of cooling towers

Even though maintenance and servicing might be a quarterly activity, your ACOP L8 legionella control procedures will require more regular testing of the water flowing through your cooling towers.

Microbial testing of cooling water

The UK’s Health and Safety Executive recommend that microbial testing for general levels of bacteria in cooling towers should be carried out weekly. These tests can be done using dip slides and an incubator which will help to give tower operators a good indication of the overall cleanliness of the cooling tower waters and if they are under microbial control.

However, you should remember that dip slide testing at monthly or longer intervals will not pick-up rapid increases in microbial growth that can occur during the late spring to early autumn. This is when temperature conditions are more favourable to the growth of Legionella bacteria.

Laboratory legionella testing for cooling towers

Routine laboratory legionella testing of cooling tower waters should be carried out at least quarterly, but more frequently under certain circumstances including:

  • Identification of potential sources of bacteria during an outbreak of Legionnaires’ disease
  • When commissioning a cooling tower or establishing a new or modified water treatment programme. Here testing should initially be carried out weekly and the frequency reviewed when it can be shown that the cooling tower system is under control.
  • If a legionella-positive sample is found, more frequent testing may be required as part of the review of the system risk assessment, to help establish the source of the contamination and when the system is back under control.
  • Where the legionella risk assessment recommends more frequent legionella testing is needed, for example if the tower is located close to a hospital or care home (susceptible populations).

Often, a complete shut down is not required for water sampling to take place. Best practice is that the legionella sampling is done at the same place, at the same time of day, at specified periods to allow for realistic comparisons.

Any changes detected during water sampling might be the first indication that the water systems are out of microbial control and that maintenance issues are developing with your cooling tower. Those people in your organisation responsible for carrying out the water testing and record keeping should be in close contact with the water treatment contractor or in-house maintenance team so that they can quickly alert them to any problems so that remedial actions can be taken as soon as possible.

Minimising disruption caused by cooling tower maintenance

Some degree of disruption is inevitable when carrying out proactive maintenance or cooling tower repairs, but this scheduled disruption should be weighed against the inconvenience of having to shut down your facility because the towers have become contaminated with Legionella bacteria, they have developed a fault or even failed.

Many businesses choose to schedule their cooling tower maintenance for weekends, when they are not being used or at periods of the year when the factory shuts down to permit maintenance throughout the whole plant, not just on the cooling towers.

Spares and replacement parts

It also makes sense to keep a stock of the spare parts which are most commonly replaced during maintenance on site, or ask Water Treatment Services to stock them for you so they are available within hours when needed.

Despite what the original manufacturers of your cooling towers might tell you, it’s rarely necessary to buy original parts from the manufacturer as compatible parts will work just as well, as long as they are made to the same or better quality standards. Having a skilled in-house maintenance team, or using a specialist cooling tower contractor like Water Treatment Services to carry out the tower maintenance and servicing each time will also cut servicing time as technicians become familiar with the set-up of your cooling systems and its quirks.

Specialist water cooling tower maintenance and repair solutions

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians, engineers and water treatment specialists, we can offer professional cooling tower maintenance, repair and servicing solutions to businesses throughout the UK and Ireland.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

More information about our indoor air quality services … here →

Cooling tower maintenance

Cooling Tower Maintenance

Cooling Tower Maintenance, Engineering Repairs & Servicing

Cooling tower maintenance

Expert cooling tower maintenance and engineering support.

Water Treatment Services is a leading UK water and environmental engineering services company offering expert cooling tower maintenance, engineering repairs and refurbishment solutions for all industrial and commercial cooling systems, towers and evaporative condensers.

Our cooling tower engineering and on-going service contracts are carried out by experienced specialists trained to deliver a comprehensive range of services.

Operating throughout the UK and Ireland our water treatment and engineering solutions have been developed to optimise thermal performance, improve reliability, extend asset life-cycles and ensure client safety and regulatory compliance obligations are fulfilled.

Cooling tower maintenance and engineering support solutions

Our water cooling tower maintenance, engineering repair and refurbishment solutions offer a number of important benefits including:

  • Cooling Tower Experts

    Engineering specialists trained to deliver a comprehensive range of cooling tower maintenance, repair and refurbishment solutions to optimise thermal performance, improve reliability, and extend asset life-cycles on all types of towers.

  • Comprehensive Service Plans

    Comprehensive service plans and technical support to ensure cooling towers operate efficiently and comply mechanically, chemically and microbiologically with the Health & Safety Executives ACOP L8 and HSG274 Part 1.

  • Energy Efficiency Optimisation

    Expert investigation and analysis to optimise thermal performance and energy efficiency of cooling towers, cooling systems, HVAC and heat transfer processes.

  • Regulatory Compliance Support

    Full cooling system compliance solutions to meet the legal standards set by the Health & Safety Executive in their ACOP L8 and HSG274 Part 1.

  • Water Treatment Servicing

    Comprehensive cooling tower water treatment service plans using the latest high performance technologies, water softeners and control equipment … cooling water treatment →

  • Monitoring & Validation

    Latest water analysis equipment to monitor and validate cooling system treatment programme performance.

  • Laboratory Water Testing

    Laboratory testing for Legionella bacteria, other waterborne pathogens and a range of chemical parameters to ensure your monitoring programmes are accurate and relevant … legionella testing →

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians and specialist engineers, we can offer comprehensive cooling tower maintenance, repair and engineering solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our engineering and water treatment solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

How do cooling towers work?

Cooling towers and evaporative condensers are used in a wide variety of commercial, industrial and process applications. They are designed to transfer heat away from a manufacturing or industrial process or an internal environment as efficiently as possible and then disperse that unwanted heat energy in to the atmosphere. Cooling towers do this either by allowing the water used as part of its cooling system to evaporate, thereby releasing energy, or by using air to cool the working liquids.

Where are cooling towers used?

Cooling towers and evaporative condensers are typically found in power stations, petrochemical plants, oil refineries, data centres, hotels, offices and other commercial buildings and manufacturing facilities. The size of the towers varies hugely, from small compact units which sit on the roof of an office or factory to huge, free-standing hyperboloid towers typical of power stations, which can be up to 200 metres high.

Hyperboloid cooling towers

Large concrete hyperboloid cooling towers.

Maintaining thermal performance and reliability

As with any structure or item of plant or machinery in a factory or business, cooling towers should be inspected regularly to ensure that they continue to perform in the way intended. Deteriorating components and equipment can soon start to impact on how efficiently your factory processes or business is operating, and a cooling tower which has totally failed could shut down production entirely.

Legionella control and ACOP L8 compliance

Another significant consideration that must be fully addressed is the health and safety dangers posed by dirty and poorly managed cooling towers. Towers and evaporative cooling systems have been implicated in several significant outbreaks of Legionnaires’ disease, a serious, potentially fatal lung condition. They are considered high risk by the Health & Safety Executive and special precautions need to be taken.

Because of this there are strict tower registration and legionella control requirements in place designed to protect the safety of employees and others and these must be followed. Failure to do so could have serious consequences and may lead to prosecution and significant fines for owners and operators of cooling towers.

Expert cooling tower inspections

The experienced and skilled engineers at Water Treatment Services can be called on to inspect, maintain and service your cooling towers, whether on an on-going basis, to pick up on any issues which could develop into a major problem, or because a situation has occurred which has required the towers to be shut down.

During a cooling tower inspection, our engineers will look at the integrity of the tower structure as a whole, they will also examine the internal components and cooling water systems and how these are treated. Additionally they will review the overall performance and heat transfer efficiencies of the tower to ensure it is operating safely and effectively.

Our engineers typically take photographs as part of the initial inspection process, and feedback all results to the client in a comprehensive written report. The client can then use this information to target where they should be concentrating repairs, or highlight any areas in the cooling tower which are a cause for concern and require further action.

Why is cooling tower maintenance important?

Cooling towers are there to do one job only – provide cooling. Should your cooling tower fail because of poor maintenance, then the entire business operation could be compromised, especially if the cooling is critical to a manufacturing process or required to provide environmental temperature control.

Regular cooling tower maintenance will also improve operational efficiencies and prolong the lifespan of your towers, avoiding the need for a costly replacement until absolutely necessary.

Effective tower maintenance procedures will also minimise the risks of bacteria growing in the cooling water systems. Legionella, the bacteria responsible for the potentially deadly respiratory condition, Legionnaires’ disease is often linked with water cooling towers which are considered a high legionella risk. Legionnaires’ disease can be fatal, and companies which have or operate cooling towers on their premises have a legal obligation to register them with their local council, and to monitor and maintain their cooling towers to protect public health.

How to register cooling towers with your local council

Under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, if your building or site uses a cooling tower or evaporative condenser you need to write to your local council to tell them about it. The only exceptions to this are when the tower contains no water that’s exposed to the air, or the water or electrical supplies have been disconnected. Additionally, if you make any changes to the tower you also need to write to your council straight away.

What are the legionella laws for cooling towers?

Cooling towers and evaporative cooling systems have been implicated in a number of serious outbreaks of Legionnaires’ disease and are considered by the Health & Safety Executive to be high risk. To control the risks from Legionella bacteria tower owners and operators must assess the risks posed and implement suitable precautions to protect employees and others from harm. The HSE’s Approved Code of Practice ACOP L8 and their supporting health and safety guidance document HSG274 Part 1 provides clear instruction and advice on what measures need to be taken. Both documents are essential reading for any duty holder, responsible person, owner or operator of a cooling tower.

Maintaining energy efficiency and optimising costs

In addition to the important public health aspects, studies have shown that a water cooling tower which is poorly maintained can become energy inefficient, costing you money. Energy costs rise by approximately 5% to 6% for every degree Celsius more in temperature. Therefore, keeping up with a maintenance programme on your cooling towers could save around 15% in your annual energy costs, partially offsetting the cost of doing the maintenance in the first place.

What does cooling tower maintenance and servicing involve?

The first step in any good cooling tower maintenance and servicing programme is to take stock of what type of cooling towers you have, how large they are, how old they are, system volumes, cooling loads, general cleanliness and a whole host of other factors.

There is no one “correct” maintenance regime for a cooling tower, and each business will have to develop their own maintenance procedures based on their specific circumstances. There are however some standard elements which usually form part of any cooling tower maintenance schedule.

First, our cooling tower engineering specialists will take an overview of the cooling units as a whole, looking for any obvious issues which might have arisen since the last inspection. Before taking a closer look at the tower, safe access must be provided and everything must be switched off and disconnected to ensure the safety of the maintenance team.

The team can then clear away any debris which has accumulated in the filters and tower pack, check for cracks and splits and look for moss, slimes and the build-up of scale. Once these visual inspections are complete, the team can then move onto checking the water supply level, flow control valves and filters, gear box and the performance of moving parts such as shaft bearings and fans; look for problems with tension and check oil levels if appropriate.

The frequency of maintenance will often depend on the type of cooling tower and how often it is used, but in many operations it is typically carried out quarterly. Record keeping is also an essential part of the maintenance process and noting down exactly what was done and when can keep you on the right side of the law when it comes to health and safety legislation, and in particular the control of Legionella bacteria and compliance with the HSE’s ACOP L8.

Water testing of cooling towers

Even though maintenance and servicing might be a quarterly activity, your ACOP L8 legionella control procedures will require more regular testing of the water flowing through your cooling towers.

Microbial testing of cooling water

The UK’s Health and Safety Executive recommend that microbial testing for general levels of bacteria in cooling towers should be carried out weekly. These tests can be done using dip slides and an incubator which will help to give tower operators a good indication of the overall cleanliness of the cooling tower waters and if they are under microbial control.

However, you should remember that dip slide testing at monthly or longer intervals will not pick-up rapid increases in microbial growth that can occur during the late spring to early autumn. This is when temperature conditions are more favourable to the growth of Legionella bacteria.

Laboratory legionella testing for cooling towers

Routine laboratory legionella testing of cooling tower waters should be carried out at least quarterly, but more frequently under certain circumstances including:

  • Identification of potential sources of bacteria during an outbreak of Legionnaires’ disease
  • When commissioning a cooling tower or establishing a new or modified water treatment programme. Here testing should initially be carried out weekly and the frequency reviewed when it can be shown that the cooling tower system is under control.
  • If a legionella-positive sample is found, more frequent testing may be required as part of the review of the system risk assessment, to help establish the source of the contamination and when the system is back under control.
  • Where the legionella risk assessment recommends more frequent legionella testing is needed, for example if the tower is located close to a hospital or care home (susceptible populations).

Often, a complete shut down is not required for water sampling to take place. Best practice is that the legionella sampling is done at the same place, at the same time of day, at specified periods to allow for realistic comparisons.

Any changes detected during water sampling might be the first indication that the water systems are out of microbial control and that maintenance issues are developing with your cooling tower. Those people in your organisation responsible for carrying out the water testing and record keeping should be in close contact with the water treatment contractor or in-house maintenance team so that they can quickly alert them to any problems so that remedial actions can be taken as soon as possible.

Minimising disruption caused by cooling tower maintenance

Some degree of disruption is inevitable when carrying out proactive maintenance or cooling tower repairs, but this scheduled disruption should be weighed against the inconvenience of having to shut down your facility because the towers have become contaminated with Legionella bacteria, they have developed a fault or even failed.

Many businesses choose to schedule their cooling tower maintenance for weekends, when they are not being used or at periods of the year when the factory shuts down to permit maintenance throughout the whole plant, not just on the cooling towers.

Spares and replacement parts

It also makes sense to keep a stock of the spare parts which are most commonly replaced during maintenance on site, or ask Water Treatment Services to stock them for you so they are available within hours when needed.

Despite what the original manufacturers of your cooling towers might tell you, it’s rarely necessary to buy original parts from the manufacturer as compatible parts will work just as well, as long as they are made to the same or better quality standards. Having a skilled in-house maintenance team, or using a specialist cooling tower contractor like Water Treatment Services to carry out the tower maintenance and servicing each time will also cut servicing time as technicians become familiar with the set-up of your cooling systems and its quirks.

Specialist water cooling tower maintenance and repair solutions

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians, engineers and water treatment specialists, we can offer professional cooling tower maintenance, repair and servicing solutions to businesses throughout the UK and Ireland.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

More information about our indoor air quality services … here →

Water Tank Relining

Tank Relining, Coating & Repair

Water Tank Lining, Coating & Repair Solutions

Tank relining, coating and repair

Cost effective solutions for defective and leaking tanks.

Water Treatment Services is a leading UK water and environmental engineering specialist offering expert water tank relining, coating and refurbishment solutions for the repair of defective and leaking water storage tanks, cooling towers, containment bunds and other liquid retaining structures.

Our expert tank reline and repair solutions use a technically advanced, high performance polyurethane coating system that will quickly breathe new life in to failing and dilapidated tanks with the minimum of disruption.

Our specialist solvent free coating system offers exceptional durability, is WRAS approved for potable water, and is suitable for tanks made from most types of material, including glass reinforced plastic (GRP), concrete and steel. We are so confident in the long lasting performance of our coating system that we guarantee it for up to 15 years for complete peace of mind.

Water storage tank reline and repair solutions

Our specialist water storage tank lining, protective coating and repair solutions offer a number of important benefits including:

  • Cost Effective

    Lining can be significantly more cost effective than removing a failing or leaking water tank. It also means that the life of existing retaining structures can be extended significantly.

  • Not Just Water Tanks

    Whilst our lining system is typically used for tanks containing water, it is also suitable for many other types of tanks and liquid retaining structures including fuel oil tanks and storage vessels, containment bunds, fire sprinkler tanks and cooling towers.

  • Quicker & Safer

    Repair and reline works are carried out by experienced specialists allowing projects to be completed quickly and efficiently to reduce business disruption.

  • Temporary Water Supply

    Where necessary we can provide a temporary water supply during the course of the works to ensure continuity and minimise disruption.

  • Corrosion & Chemical Resistant

    Our specialist polyurethane coating system will prevent further corrosion and offers excellent chemical resistance.

  • Bacterial Control

    Our seamless coating system cures to form a smooth, tough finish to provide long term protection against microbial colonisation of tank linings from Legionella, Pseudomonas, biofilm and other waterborne pathogens.

  • WRAS Approved

    Specialist solvent free polyurethane coating system is WRAS approved for use in potable water applications.

  • Structural Movement

    Our coating system cures to form a tough but flexible finish capable of accommodating structural movement.

  • Easy to Maintain

    Fast curing protective coating forms an incredibly tough, durable finish for easy maintenance and cleaning.

  • 15 Year Guaranteed Performance

    Our coating systems are guaranteed for up to 15 years for complete peace of mind.

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained engineers and tank coating specialists we can offer professional water tank relining and repair solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our tank repair and refurbishment solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

Should you replace your leaking water tank or opt for a repair and reline solution?

Businesses of all sizes, across all industry sectors use and maintain water tanks, which are as diverse in type and size as the business that own and operate them. It’s essential for safety and efficient running of the business that these tanks are well-maintained and adhere to current legislation covering the water regulations and health and safety matters. However on the ball your maintenance teams are with your water treatment controls, there is no getting away from the fact that over time your water tanks might spring a leak or start to rust and begin to cause you serious operational issues. So the question is… do you replace your leaking water tank or opt for a repair and reline solution?

What is tank relining?

If you use any of the various types of water tank in your buildings or as part of your processes and have started to notice leaks, staining or corrosion then you may have a problem that needs investigation to prevent further deterioration, water damage, microbial contamination and even disruption to your business operations.

Fortunately there’s no need to replace failing tanks. This is often the last resort option, and can be exceptionally costly. Repairing or relining, as the name suggests involves reusing your existing tank and simply applying a new, robust internal lining system formed using a high performance polyurethane coating that will last for many years to come.

What types of tanks can be relined?

Relining is typically used for tanks containing water, but is also suitable for many other liquid storage vessels. The types of tanks suitable for our protective coatings are diverse and include fuel oil tanks and storage vessels, sectional water tanks, process tanks, liquor tanks, containment bunds, potable water tanks, fire sprinkler tanks and cooling towers.

Our specialist relining process is suitable for tanks made from most types of material, including glass reinforced plastic (GRP), concrete and steel.

  • Sectional Steel Water Tanks
  • Glass Reinforced Plastic (GRP)
  • Concrete
  • Flat Steel
  • Attenuation Tanks
  • Effluent Tanks
  • Interceptors
  • Containment Bunds
  • Fire Sprinkler Tanks
  • Cooling Towers

What are the risks from failing and leaking water tanks?

Tanks which have begun to fail suffer from corrosion, deteriorating joints and seals. They may also develop microscopic surface pits, cracks and fissures to their internal surfaces allowing bacteria (Legionella, Pseudomonas) and biofilm to colonise the water system. This colonisation can have a significant impact on water quality, system performance and safety.

If you have procedures in place to monitor and test the water flowing through your systems, the first indications that your tanks may have developed issues could be evident in the testing results. Bacterial counts may have started to rise, or you may get persistent Legionella positives. You might also start to spot pools of water below or adjacent to the tanks, surface staining or there may be sediment building up on the bottom of the tanks.

Less obvious indications are signs of corrosion on bolts or other metal components of your tank, biofilm (slime) may also be evident inside the joints and on internal surfaces of the tank. Any of these signs can indicate that your tank is past its best and it is time to think about either replacing it, or having it professionally relined.

Remember – If you delay over the decision about any tank reline and repair works, it might get to the stage where relining is no longer an option and you have to replace the whole thing. Is this happens Water Treatment Services offer a full tank replacement service and our specialists will review all options with you to identify the most appropriate, cost effective solution.

What are the benefits of water tank lining?

There are several advantages in repairing and lining an existing water tank with our high performance polyurethane coating system, and they include:

Cost effective alternative to tank replacement

Cost is the obvious main advantage, as a tank relining solution can be significantly more cost effective than removing a failing tank, buying a replacement, installation and recommissioning back in to service.

Versatility

Our specialist tank lining system is typically used for water storage tanks, it is also suitable for many other types of tanks and liquid retaining structures including fuel oil tanks, storage vessels, process tanks, liquor tanks, interceptors, containment bunds, fire sprinkler tanks and cooling towers.

Quicker and safer

It’s also safer and quicker too, with relining works being carried out by our experienced specialists, works can be completed quickly and efficiently, reducing down-time and business disruption to a minimum.

Temporary water supply

Where required we can provide a temporary water supply for the duration of the works to ensure continuity and minimise disruption.

Corrosion and chemical resistant

Our specialist polyurethane coating system provides long term protection against further corrosion and sediment issues, and offers excellent chemical resistance.

Improved microbial control

Our seamless tank reline system cures to form a smooth, incredibly tough finish that will help to combat microbial colonisation and contamination of tank linings from Legionella, Pseudomonas, biofilm and other waterborne pathogens.

WRAS approved

Our specialist solvent free polyurethane coating system is WRAS approved for use in potable water applications.

Accommodates structural movement

Our coating system cures to form a tough, flexible finish capable of accommodating structural movement to guard against settlement and expansion cracking.

Reduced maintenance

Fast curing to form an incredibly tough, robust finish for easy maintenance and cleaning.

Guaranteed performance

Our polyurethane coating systems are guaranteed for up to 15 years for complete peace of mind. This is more than the typical guarantee when you buy a brand-new tank.

How are tanks relined?

Depending on the size of the water tanks being refurbished and relined, the entire process can safely be completed surprisingly quickly. Certainly much quicker than if they were to be removed and replaced with new tanks.

After all site inspections and safety risk assessments have been completed the first stage of the process is to drain the water from the tank and inspect the structural integrity and condition of the interior surfaces, components, joints etc.

  • Good surface preparation is essential

    The relining process works best when there is a clean, stable, dust free substrate for the new polyurethane lining to adhere to. If the interior of the tank is in particularly poor condition, blasting may be carried out on a steel tank, or the surface of a concrete tank may be etched to provide a better key for the new tank lining.

  • High performance polyurethane coating

    Once the substrate preparations are complete the high performance, polyurethane coating system is then applied to the interior of the tank surfaces and allowed to cure. Our specialists will use a high-pressure spray to apply multiple layers of our coating system to the inside surfaces of the tank, leaving it to cure and then repeating the process as required until a suitable membrane finish is achieved.

    For smaller tanks, the polyurethane coating may be carefully painted on rather than sprayed. Once the new lining has achieved a full cure, the tank is thoroughly inspected and then refilled.

Why use polyurethane coatings?

The experts at Water Treatment Services use a high performance, solvent free polyurethane coating system that has been developed specifically for the repair and refurbishment of failing and leaking water tanks, cooling towers, fire sprinkler tanks and other liquid storage vessels.

Our high performance polyurethane coating systems offer a number of market leading benefits including:

  • WRAS & DWI approved for potable water applications.
  • Fast curing to form an incredibly tough, robust finish for easy maintenance.
  • Excellent chemical resistance.
  • Safer solvent free technology with no taint or odour.
  • Tough but flexible finish capable of accommodating structural movement.
  • Guaranteed performance – up to 15 year guarantee.

The risks from Legionella bacteria in cold water tanks

In the UK one of the primary health and safety responsibilities businesses using water have is to guard against the risks from Legionella bacteria. It is a legal requirement underpinned by the Health and Safety at Work etc Act 1974, the Control of Substances Hazardous to Health Regulations 2002, and the Management of Health and Safety at Work Regulations 1999.

Legionella is a bacteria which thrives in engineered water systems, especially in water storage tanks and pipework which are poorly maintained or have begun to corrode.

Legionella bacteria can cause Legionnaires’ disease, a severe type of pneumonia which can prove fatal in vulnerable groups. Companies which use and operate water storage tanks, cooling towers and other types of water system have a legal obligation under UK health and safety law to protect their staff and others from the risks associated with Legionella bacteria and Legionnaires’ disease. The Health and Safety Executives Approved Code of Practice ACOP L8 and their safety guidance HSG274 are essential reading for business owners and operators.

To comply with the law businesses must carry out a legionella risk assessment, they must appoint someone to be responsible for controlling the risks, monitoring water quality, and taking steps to resolve problems as soon as they are made aware of them. A water tank which is poorly maintained, has started to corrode, has significant surface imperfections or is leaking is the ideal breeding ground for Legionella bacteria and other waterborne pathogens. Taking steps to have it relined isn’t just a cost-saving exercise for your business, it’s a legal requirement too.

Specialist water tank relining and repair solutions

Contact Water Treatment Services today to find out more about our specialist water storage tank repair and relining solutions.

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained engineers and tank coating specialists we can offer professional water tank coating and repair solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our tank relining and repair solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

For more information about the Drinking Water Inspectorate (DWI) … here →

Swimming pool water testing

Swimming Pool Water Testing

Water Testing for Swimming Pools, Spas & Hot Tubs

Swimming pool water testing

Specialist testing and analysis for pools, spas and hot tubs.

Water Treatment Services is a leading water and environmental engineering specialist offering a range of laboratory based microbiological analysis and swimming pool water testing solutions (including tests for spas and hot tubs) to businesses and private individuals throughout the UK and Ireland.

Our specialist laboratory procedures include tests for a range of common pathogens found in pool waters including E. coli, Pseudomonas aeruginosa, Total coliforms, TVC/Aerobic colony counts, Legionella bacteria and other less common organisms that can contaminate pools.

If you’re one of the many UK businesses or private households who own or operate a pool, hot tub or spa, then you’ll already know that maintaining the quality of the water in your pool is something which can’t be ignored.

Specialist pool water analysis and testing

Our specialist laboratory water analysis solutions for pools, spas and hot tubs include:

  • Laboratory Water Testing & Analysis

    Specialist laboratory analysis of water from swimming pools, spas and hot tubs. Test for an extensive range of chemical and microbiological parameters.

  • Microbiological Water Analysis

    Laboratory analysis for a range of microbial parameters including E. coli, Pseudomonas aeruginosa, Total coliforms, TVC/Aerobic colony count, Legionella bacteria and other waterborne pathogens that can contaminate pool waters.

  • Chemical Analysis

    Testing for specified chemical parameters in water.

  • In-field Sampling.

    Expert in-field water sampling.

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained engineers and technicians we can offer professional, cost effective pool water testing, in-field sampling and laboratory microbiological analysis services across the UK and Ireland.

Contact Water Treatment Services today to learn how our professional water quality analysis, testing and sampling solutions can help maintain pool water quality, safety standards and regulatory compliance processes. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

Why test swimming pool water?

Unlike other water systems found in homes and commercial premises where the water is flushed or drained away after each use, swimming pools, hot tubs and spas could be considered as a re-circulating water system where the water is retained and re-used many times over. If you’re not testing the chemical and microbial water quality regularly, taking steps to maintain balance and keep it clean, issues such as pH and water clarity can change, and more worryingly bacteria can start to grow rapidly.

What bacteria can contaminate a pool, spa or hot tub?

Bacteria such as E. coli, Pseudomonas aeruginosa and Legionella thrive in warm, poorly or untreated water and have the potential to make people using the pool or spa very ill. Don’t assume that water which appears crystal clear is clean and safe to use – the types of bacteria which can grow in water are invisible to the naked eye.

UK laws dealing with water quality testing in pools and spas

UK health and safety laws dealing with swimming pool and spa water quality, testing and treatment really only come into play if you’re running a business such as a leisure centre, gym or hotel, or the pool is in a holiday property which is let to paying guests.

Owners and operators of pools and spas need to ensure sure that the water quality and treatment programmes are effective and meet current standards. Although the law might not apply to domestic pools and spas, they provide excellent guidelines and standards which it makes sense to read, understand and comply with.

For more information both the Health and Safety Executive and the Pool Water Treatment Advisory Group (PWTAG) provide excellent guidance to help pool operators comply with health and safety law.

Microbial water testing

It is very important that regular microbial analysis is carried out to ensure the effectiveness of the water treatment programme is maintained and the pool is safe to use. Specialist microbial analysis is carried out in the laboratory, not in-field.

Swimming pool analysis

Swimming pools operated as part of a business should be tested on a monthly basis. Microbial testing of privately operated pools is at the owner’s discretion, however we recommend the same testing frequency.

Our swimming pool microbial laboratory testing suite includes for the following:

  • E. coli

  • Pseudomonas aeruginosa

  • Total coliforms

  • TVC/Aerobic colony count at 37C

Frequency – These tests should be carried out on a monthly basis.

Hot tubs and spa pool testing

Hot tubs and spa pools typically contain lower volumes of water and operate at higher temperatures than swimming pools. These factors can increase the potential for bacterial growth in the water, including the risks from Legionella bacteria and other waterborne pathogens.

Our hot tub and spa pool microbial testing suite includes for the following:

  • E. coli

  • Pseudomonas aeruginosa

  • Total coliforms

  • TVC/Aerobic colony count at 37C

  • Legionella bacteria

Frequency – These tests should be carried out on a monthly basis, or when the spa is first used or recommissioned, after a report of ill-health, if there are problems of contamination, or if there have been alterations in the treatment/maintenance programmes.

If there are reports of ill-health from bathers further testing may also be required for other organisms including Staphylococcus aureus, Cryptosporidium, Giardia and possibly viruses.

Monitoring pool balance and pH

In addition to routine microbial analysis of pool waters regular chemical testing should also be carried out. One of the most important chemical parameters you’ll need to keep under control in your swimming pool or spa is the pH of the water, often referred to as the “balance”. This is a way of determining how acidic or alkaline the water is.

Adding pool chemicals to the water can often change the pH levels and may prevent other chemicals from working as well as intended. pH is measured on a scale of 0 to 14. 0 is an extremely strong acid, 14 is strongly alkaline, and at the mid-point, 7, the water is neutral.

Experts agree that the ideal pH range for water in swimming pools or hot tubs is between 7.2 and 7.6. This is a range which is comfortable for skin and eyes, allows chlorine added to the water to work properly, and within this range water scale problems are unlikely.

If the water pH starts to fall too low into the “acidic” range, you may find that the water becomes irritating to skin or eyes, pool equipment including heater elements start to corrode. You may also start to notice a build-up of minerals around the edges of the pool itself.

On the other hand, if the water becomes too alkaline, you might notice skin irritation, but also water clarity reduces and scale starts to form on the sides of the spa or pool.

In the UK, mains water from the tap will have different pH levels depending on where you are in the country, how your water is treated and local geology – what type of rocks the water flows through on its way to your local reservoir. It’s therefore impossible to set-out a standard water treatment regime which works for everyone, as the water in tubs will tend to be different from the start.

Monitoring chlorine levels in your swimming pool

Measuring levels of chlorine or your biocide of choice in pool water is also important. Chlorine is currently the most popular biocide for the control of bacteria in pools but needs to be maintained at optimum levels – enough to kill any bacteria in the water, but not too much to cause health issues for bathers or accelerated corrosion of the equipment and other components used in the pool or spa.

Testing chemical parameters

There are various ways of testing the essential chemical parameters in your pool water including pH and chlorine (usually free or total chlorine).

  • pH testing

    Litmus paper test strips will measure pool water pH and are cost-effective, quick and simple to use. They work by turning a different colour depending on the pH of the water so you can easily read the result off a chart.

    Tablets are also available to measure pH, they work by dissolving in water and will change colour to indicate the result – they are also easy to use and inexpensive.

  • Chlorine testing

    Various DPD tablets (DPD1, 2, 3 and 4) are available and will measure chlorine levels – usually free and total chlorine. They are used with a comparator or a photometer to ensure the correct levels of chlorine are present in the pool water.

Electronic meters are also available that will measure pH and chlorine levels. These are simple to use but more costly than test strips and tablet methods.

Please remember that there is no “best” way of testing the chemical parameters of your water; the key is to understand why you should be testing, how to do it correctly, and to do it regularly.

Expert swimming pool water testing and microbiological analysis

Contact Water Treatment Services today to find out more about our laboratory water analysis services including microbiological testing of pool, spa and hot tub waters.

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of specially trained technicians and consultants we can offer professional, cost effective microbiological water analysis solutions across the whole of the UK and Ireland.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

More information about managing health and safety in swimming pools from the Health and Safety Executive (HSG179) … here →

Expansion vessels and legionella risks

Guide to Expansion Vessels & Legionella Risks

In this expert guide the specialists at Water Treatment Services examine the use of expansion vessels in pressurised heating systems, the potential legionella risks arising from their use and what can be done to manage those risks in line with current health and safety guidance from the Health and Safety Executive including ACOP L8 and HSG274 Part 2.

Read more

HSE ACOP L8 Download

HSE ACOP L8 Download – Guidelines for Controlling Legionella in Water Systems

The Health & Safety Executives Approved Code of Practice ACOP L8 – “Legionnaires’ disease: The control of legionella bacteria in water systems” provides guidelines for those with responsibility for the control of legionella in water systems. This includes dutyholders, employers, those in control of premises including landlords and those with health and safety responsibilities for others. If that describes you, or if you are involved with the control of legionella at your place of work then get up to speed by downloading your complimentary copy of the HSE’s ACOP L8 now – simply use the download button below.

Read more

Being a Duty Holder for Legionella – What Does it Mean?

Being a Duty Holder for Legionella – What Does it Mean?

Here we take a look at what it means to be the duty holder, responsible for the control of legionella and Legionnaires’ disease risks in a business. In the UK legionella control is just one of the many issues which business owners, directors and senior managers have to be on top of – it’s a legal requirement.

Read more

E.coli water testing for hot tubs and swimming pools

What is E.Coli & Why Testing Hot Tubs & Swimming Pools is a Good Idea

It’s not just Legionella or Pseudomonas bacteria that you have to worry about lurking in your water. Escherichia Coli or E.coli is another bacteria which just loves living in man-made water systems like hot tubs, spas and swimming pools. It will breed rapidly given the right conditions which is why regular water testing is important. Legionella bacteria does best in stored or stagnant water systems where the temperatures are warmer, but E.coli prefers hotter temperatures that are sustained over longer periods.

Read more

Pages

Cooling tower maintenance

Cooling Tower Maintenance

Cooling Tower Maintenance, Engineering Repairs & Servicing

Cooling tower maintenance

Expert cooling tower maintenance and engineering support.

Water Treatment Services is a leading UK water and environmental engineering services company offering expert cooling tower maintenance, engineering repairs and refurbishment solutions for all industrial and commercial cooling systems, towers and evaporative condensers.

Our cooling tower engineering and on-going service contracts are carried out by experienced specialists trained to deliver a comprehensive range of services.

Operating throughout the UK and Ireland our water treatment and engineering solutions have been developed to optimise thermal performance, improve reliability, extend asset life-cycles and ensure client safety and regulatory compliance obligations are fulfilled.

Cooling tower maintenance and engineering support solutions

Our water cooling tower maintenance, engineering repair and refurbishment solutions offer a number of important benefits including:

  • Cooling Tower Experts

    Engineering specialists trained to deliver a comprehensive range of cooling tower maintenance, repair and refurbishment solutions to optimise thermal performance, improve reliability, and extend asset life-cycles on all types of towers.

  • Comprehensive Service Plans

    Comprehensive service plans and technical support to ensure cooling towers operate efficiently and comply mechanically, chemically and microbiologically with the Health & Safety Executives ACOP L8 and HSG274 Part 1.

  • Energy Efficiency Optimisation

    Expert investigation and analysis to optimise thermal performance and energy efficiency of cooling towers, cooling systems, HVAC and heat transfer processes.

  • Regulatory Compliance Support

    Full cooling system compliance solutions to meet the legal standards set by the Health & Safety Executive in their ACOP L8 and HSG274 Part 1.

  • Water Treatment Servicing

    Comprehensive cooling tower water treatment service plans using the latest high performance technologies, water softeners and control equipment … cooling water treatment →

  • Monitoring & Validation

    Latest water analysis equipment to monitor and validate cooling system treatment programme performance.

  • Laboratory Water Testing

    Laboratory testing for Legionella bacteria, other waterborne pathogens and a range of chemical parameters to ensure your monitoring programmes are accurate and relevant … legionella testing →

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians and specialist engineers, we can offer comprehensive cooling tower maintenance, repair and engineering solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our engineering and water treatment solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

How do cooling towers work?

Cooling towers and evaporative condensers are used in a wide variety of commercial, industrial and process applications. They are designed to transfer heat away from a manufacturing or industrial process or an internal environment as efficiently as possible and then disperse that unwanted heat energy in to the atmosphere. Cooling towers do this either by allowing the water used as part of its cooling system to evaporate, thereby releasing energy, or by using air to cool the working liquids.

Where are cooling towers used?

Cooling towers and evaporative condensers are typically found in power stations, petrochemical plants, oil refineries, data centres, hotels, offices and other commercial buildings and manufacturing facilities. The size of the towers varies hugely, from small compact units which sit on the roof of an office or factory to huge, free-standing hyperboloid towers typical of power stations, which can be up to 200 metres high.

Hyperboloid cooling towers

Large concrete hyperboloid cooling towers.

Maintaining thermal performance and reliability

As with any structure or item of plant or machinery in a factory or business, cooling towers should be inspected regularly to ensure that they continue to perform in the way intended. Deteriorating components and equipment can soon start to impact on how efficiently your factory processes or business is operating, and a cooling tower which has totally failed could shut down production entirely.

Legionella control and ACOP L8 compliance

Another significant consideration that must be fully addressed is the health and safety dangers posed by dirty and poorly managed cooling towers. Towers and evaporative cooling systems have been implicated in several significant outbreaks of Legionnaires’ disease, a serious, potentially fatal lung condition. They are considered high risk by the Health & Safety Executive and special precautions need to be taken.

Because of this there are strict tower registration and legionella control requirements in place designed to protect the safety of employees and others and these must be followed. Failure to do so could have serious consequences and may lead to prosecution and significant fines for owners and operators of cooling towers.

Expert cooling tower inspections

The experienced and skilled engineers at Water Treatment Services can be called on to inspect, maintain and service your cooling towers, whether on an on-going basis, to pick up on any issues which could develop into a major problem, or because a situation has occurred which has required the towers to be shut down.

During a cooling tower inspection, our engineers will look at the integrity of the tower structure as a whole, they will also examine the internal components and cooling water systems and how these are treated. Additionally they will review the overall performance and heat transfer efficiencies of the tower to ensure it is operating safely and effectively.

Our engineers typically take photographs as part of the initial inspection process, and feedback all results to the client in a comprehensive written report. The client can then use this information to target where they should be concentrating repairs, or highlight any areas in the cooling tower which are a cause for concern and require further action.

Why is cooling tower maintenance important?

Cooling towers are there to do one job only – provide cooling. Should your cooling tower fail because of poor maintenance, then the entire business operation could be compromised, especially if the cooling is critical to a manufacturing process or required to provide environmental temperature control.

Regular cooling tower maintenance will also improve operational efficiencies and prolong the lifespan of your towers, avoiding the need for a costly replacement until absolutely necessary.

Effective tower maintenance procedures will also minimise the risks of bacteria growing in the cooling water systems. Legionella, the bacteria responsible for the potentially deadly respiratory condition, Legionnaires’ disease is often linked with water cooling towers which are considered a high legionella risk. Legionnaires’ disease can be fatal, and companies which have or operate cooling towers on their premises have a legal obligation to register them with their local council, and to monitor and maintain their cooling towers to protect public health.

How to register cooling towers with your local council

Under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, if your building or site uses a cooling tower or evaporative condenser you need to write to your local council to tell them about it. The only exceptions to this are when the tower contains no water that’s exposed to the air, or the water or electrical supplies have been disconnected. Additionally, if you make any changes to the tower you also need to write to your council straight away.

What are the legionella laws for cooling towers?

Cooling towers and evaporative cooling systems have been implicated in a number of serious outbreaks of Legionnaires’ disease and are considered by the Health & Safety Executive to be high risk. To control the risks from Legionella bacteria tower owners and operators must assess the risks posed and implement suitable precautions to protect employees and others from harm. The HSE’s Approved Code of Practice ACOP L8 and their supporting health and safety guidance document HSG274 Part 1 provides clear instruction and advice on what measures need to be taken. Both documents are essential reading for any duty holder, responsible person, owner or operator of a cooling tower.

Maintaining energy efficiency and optimising costs

In addition to the important public health aspects, studies have shown that a water cooling tower which is poorly maintained can become energy inefficient, costing you money. Energy costs rise by approximately 5% to 6% for every degree Celsius more in temperature. Therefore, keeping up with a maintenance programme on your cooling towers could save around 15% in your annual energy costs, partially offsetting the cost of doing the maintenance in the first place.

What does cooling tower maintenance and servicing involve?

The first step in any good cooling tower maintenance and servicing programme is to take stock of what type of cooling towers you have, how large they are, how old they are, system volumes, cooling loads, general cleanliness and a whole host of other factors.

There is no one “correct” maintenance regime for a cooling tower, and each business will have to develop their own maintenance procedures based on their specific circumstances. There are however some standard elements which usually form part of any cooling tower maintenance schedule.

First, our cooling tower engineering specialists will take an overview of the cooling units as a whole, looking for any obvious issues which might have arisen since the last inspection. Before taking a closer look at the tower, safe access must be provided and everything must be switched off and disconnected to ensure the safety of the maintenance team.

The team can then clear away any debris which has accumulated in the filters and tower pack, check for cracks and splits and look for moss, slimes and the build-up of scale. Once these visual inspections are complete, the team can then move onto checking the water supply level, flow control valves and filters, gear box and the performance of moving parts such as shaft bearings and fans; look for problems with tension and check oil levels if appropriate.

The frequency of maintenance will often depend on the type of cooling tower and how often it is used, but in many operations it is typically carried out quarterly. Record keeping is also an essential part of the maintenance process and noting down exactly what was done and when can keep you on the right side of the law when it comes to health and safety legislation, and in particular the control of Legionella bacteria and compliance with the HSE’s ACOP L8.

Water testing of cooling towers

Even though maintenance and servicing might be a quarterly activity, your ACOP L8 legionella control procedures will require more regular testing of the water flowing through your cooling towers.

Microbial testing of cooling water

The UK’s Health and Safety Executive recommend that microbial testing for general levels of bacteria in cooling towers should be carried out weekly. These tests can be done using dip slides and an incubator which will help to give tower operators a good indication of the overall cleanliness of the cooling tower waters and if they are under microbial control.

However, you should remember that dip slide testing at monthly or longer intervals will not pick-up rapid increases in microbial growth that can occur during the late spring to early autumn. This is when temperature conditions are more favourable to the growth of Legionella bacteria.

Laboratory legionella testing for cooling towers

Routine laboratory legionella testing of cooling tower waters should be carried out at least quarterly, but more frequently under certain circumstances including:

  • Identification of potential sources of bacteria during an outbreak of Legionnaires’ disease
  • When commissioning a cooling tower or establishing a new or modified water treatment programme. Here testing should initially be carried out weekly and the frequency reviewed when it can be shown that the cooling tower system is under control.
  • If a legionella-positive sample is found, more frequent testing may be required as part of the review of the system risk assessment, to help establish the source of the contamination and when the system is back under control.
  • Where the legionella risk assessment recommends more frequent legionella testing is needed, for example if the tower is located close to a hospital or care home (susceptible populations).

Often, a complete shut down is not required for water sampling to take place. Best practice is that the legionella sampling is done at the same place, at the same time of day, at specified periods to allow for realistic comparisons.

Any changes detected during water sampling might be the first indication that the water systems are out of microbial control and that maintenance issues are developing with your cooling tower. Those people in your organisation responsible for carrying out the water testing and record keeping should be in close contact with the water treatment contractor or in-house maintenance team so that they can quickly alert them to any problems so that remedial actions can be taken as soon as possible.

Minimising disruption caused by cooling tower maintenance

Some degree of disruption is inevitable when carrying out proactive maintenance or cooling tower repairs, but this scheduled disruption should be weighed against the inconvenience of having to shut down your facility because the towers have become contaminated with Legionella bacteria, they have developed a fault or even failed.

Many businesses choose to schedule their cooling tower maintenance for weekends, when they are not being used or at periods of the year when the factory shuts down to permit maintenance throughout the whole plant, not just on the cooling towers.

Spares and replacement parts

It also makes sense to keep a stock of the spare parts which are most commonly replaced during maintenance on site, or ask Water Treatment Services to stock them for you so they are available within hours when needed.

Despite what the original manufacturers of your cooling towers might tell you, it’s rarely necessary to buy original parts from the manufacturer as compatible parts will work just as well, as long as they are made to the same or better quality standards. Having a skilled in-house maintenance team, or using a specialist cooling tower contractor like Water Treatment Services to carry out the tower maintenance and servicing each time will also cut servicing time as technicians become familiar with the set-up of your cooling systems and its quirks.

Specialist water cooling tower maintenance and repair solutions

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians, engineers and water treatment specialists, we can offer professional cooling tower maintenance, repair and servicing solutions to businesses throughout the UK and Ireland.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

More information about our indoor air quality services … here →

Cooling tower maintenance

Cooling Tower Maintenance

Cooling Tower Maintenance, Engineering Repairs & Servicing

Cooling tower maintenance

Expert cooling tower maintenance and engineering support.

Water Treatment Services is a leading UK water and environmental engineering services company offering expert cooling tower maintenance, engineering repairs and refurbishment solutions for all industrial and commercial cooling systems, towers and evaporative condensers.

Our cooling tower engineering and on-going service contracts are carried out by experienced specialists trained to deliver a comprehensive range of services.

Operating throughout the UK and Ireland our water treatment and engineering solutions have been developed to optimise thermal performance, improve reliability, extend asset life-cycles and ensure client safety and regulatory compliance obligations are fulfilled.

Cooling tower maintenance and engineering support solutions

Our water cooling tower maintenance, engineering repair and refurbishment solutions offer a number of important benefits including:

  • Cooling Tower Experts

    Engineering specialists trained to deliver a comprehensive range of cooling tower maintenance, repair and refurbishment solutions to optimise thermal performance, improve reliability, and extend asset life-cycles on all types of towers.

  • Comprehensive Service Plans

    Comprehensive service plans and technical support to ensure cooling towers operate efficiently and comply mechanically, chemically and microbiologically with the Health & Safety Executives ACOP L8 and HSG274 Part 1.

  • Energy Efficiency Optimisation

    Expert investigation and analysis to optimise thermal performance and energy efficiency of cooling towers, cooling systems, HVAC and heat transfer processes.

  • Regulatory Compliance Support

    Full cooling system compliance solutions to meet the legal standards set by the Health & Safety Executive in their ACOP L8 and HSG274 Part 1.

  • Water Treatment Servicing

    Comprehensive cooling tower water treatment service plans using the latest high performance technologies, water softeners and control equipment … cooling water treatment →

  • Monitoring & Validation

    Latest water analysis equipment to monitor and validate cooling system treatment programme performance.

  • Laboratory Water Testing

    Laboratory testing for Legionella bacteria, other waterborne pathogens and a range of chemical parameters to ensure your monitoring programmes are accurate and relevant … legionella testing →

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians and specialist engineers, we can offer comprehensive cooling tower maintenance, repair and engineering solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our engineering and water treatment solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

How do cooling towers work?

Cooling towers and evaporative condensers are used in a wide variety of commercial, industrial and process applications. They are designed to transfer heat away from a manufacturing or industrial process or an internal environment as efficiently as possible and then disperse that unwanted heat energy in to the atmosphere. Cooling towers do this either by allowing the water used as part of its cooling system to evaporate, thereby releasing energy, or by using air to cool the working liquids.

Where are cooling towers used?

Cooling towers and evaporative condensers are typically found in power stations, petrochemical plants, oil refineries, data centres, hotels, offices and other commercial buildings and manufacturing facilities. The size of the towers varies hugely, from small compact units which sit on the roof of an office or factory to huge, free-standing hyperboloid towers typical of power stations, which can be up to 200 metres high.

Hyperboloid cooling towers

Large concrete hyperboloid cooling towers.

Maintaining thermal performance and reliability

As with any structure or item of plant or machinery in a factory or business, cooling towers should be inspected regularly to ensure that they continue to perform in the way intended. Deteriorating components and equipment can soon start to impact on how efficiently your factory processes or business is operating, and a cooling tower which has totally failed could shut down production entirely.

Legionella control and ACOP L8 compliance

Another significant consideration that must be fully addressed is the health and safety dangers posed by dirty and poorly managed cooling towers. Towers and evaporative cooling systems have been implicated in several significant outbreaks of Legionnaires’ disease, a serious, potentially fatal lung condition. They are considered high risk by the Health & Safety Executive and special precautions need to be taken.

Because of this there are strict tower registration and legionella control requirements in place designed to protect the safety of employees and others and these must be followed. Failure to do so could have serious consequences and may lead to prosecution and significant fines for owners and operators of cooling towers.

Expert cooling tower inspections

The experienced and skilled engineers at Water Treatment Services can be called on to inspect, maintain and service your cooling towers, whether on an on-going basis, to pick up on any issues which could develop into a major problem, or because a situation has occurred which has required the towers to be shut down.

During a cooling tower inspection, our engineers will look at the integrity of the tower structure as a whole, they will also examine the internal components and cooling water systems and how these are treated. Additionally they will review the overall performance and heat transfer efficiencies of the tower to ensure it is operating safely and effectively.

Our engineers typically take photographs as part of the initial inspection process, and feedback all results to the client in a comprehensive written report. The client can then use this information to target where they should be concentrating repairs, or highlight any areas in the cooling tower which are a cause for concern and require further action.

Why is cooling tower maintenance important?

Cooling towers are there to do one job only – provide cooling. Should your cooling tower fail because of poor maintenance, then the entire business operation could be compromised, especially if the cooling is critical to a manufacturing process or required to provide environmental temperature control.

Regular cooling tower maintenance will also improve operational efficiencies and prolong the lifespan of your towers, avoiding the need for a costly replacement until absolutely necessary.

Effective tower maintenance procedures will also minimise the risks of bacteria growing in the cooling water systems. Legionella, the bacteria responsible for the potentially deadly respiratory condition, Legionnaires’ disease is often linked with water cooling towers which are considered a high legionella risk. Legionnaires’ disease can be fatal, and companies which have or operate cooling towers on their premises have a legal obligation to register them with their local council, and to monitor and maintain their cooling towers to protect public health.

How to register cooling towers with your local council

Under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, if your building or site uses a cooling tower or evaporative condenser you need to write to your local council to tell them about it. The only exceptions to this are when the tower contains no water that’s exposed to the air, or the water or electrical supplies have been disconnected. Additionally, if you make any changes to the tower you also need to write to your council straight away.

What are the legionella laws for cooling towers?

Cooling towers and evaporative cooling systems have been implicated in a number of serious outbreaks of Legionnaires’ disease and are considered by the Health & Safety Executive to be high risk. To control the risks from Legionella bacteria tower owners and operators must assess the risks posed and implement suitable precautions to protect employees and others from harm. The HSE’s Approved Code of Practice ACOP L8 and their supporting health and safety guidance document HSG274 Part 1 provides clear instruction and advice on what measures need to be taken. Both documents are essential reading for any duty holder, responsible person, owner or operator of a cooling tower.

Maintaining energy efficiency and optimising costs

In addition to the important public health aspects, studies have shown that a water cooling tower which is poorly maintained can become energy inefficient, costing you money. Energy costs rise by approximately 5% to 6% for every degree Celsius more in temperature. Therefore, keeping up with a maintenance programme on your cooling towers could save around 15% in your annual energy costs, partially offsetting the cost of doing the maintenance in the first place.

What does cooling tower maintenance and servicing involve?

The first step in any good cooling tower maintenance and servicing programme is to take stock of what type of cooling towers you have, how large they are, how old they are, system volumes, cooling loads, general cleanliness and a whole host of other factors.

There is no one “correct” maintenance regime for a cooling tower, and each business will have to develop their own maintenance procedures based on their specific circumstances. There are however some standard elements which usually form part of any cooling tower maintenance schedule.

First, our cooling tower engineering specialists will take an overview of the cooling units as a whole, looking for any obvious issues which might have arisen since the last inspection. Before taking a closer look at the tower, safe access must be provided and everything must be switched off and disconnected to ensure the safety of the maintenance team.

The team can then clear away any debris which has accumulated in the filters and tower pack, check for cracks and splits and look for moss, slimes and the build-up of scale. Once these visual inspections are complete, the team can then move onto checking the water supply level, flow control valves and filters, gear box and the performance of moving parts such as shaft bearings and fans; look for problems with tension and check oil levels if appropriate.

The frequency of maintenance will often depend on the type of cooling tower and how often it is used, but in many operations it is typically carried out quarterly. Record keeping is also an essential part of the maintenance process and noting down exactly what was done and when can keep you on the right side of the law when it comes to health and safety legislation, and in particular the control of Legionella bacteria and compliance with the HSE’s ACOP L8.

Water testing of cooling towers

Even though maintenance and servicing might be a quarterly activity, your ACOP L8 legionella control procedures will require more regular testing of the water flowing through your cooling towers.

Microbial testing of cooling water

The UK’s Health and Safety Executive recommend that microbial testing for general levels of bacteria in cooling towers should be carried out weekly. These tests can be done using dip slides and an incubator which will help to give tower operators a good indication of the overall cleanliness of the cooling tower waters and if they are under microbial control.

However, you should remember that dip slide testing at monthly or longer intervals will not pick-up rapid increases in microbial growth that can occur during the late spring to early autumn. This is when temperature conditions are more favourable to the growth of Legionella bacteria.

Laboratory legionella testing for cooling towers

Routine laboratory legionella testing of cooling tower waters should be carried out at least quarterly, but more frequently under certain circumstances including:

  • Identification of potential sources of bacteria during an outbreak of Legionnaires’ disease
  • When commissioning a cooling tower or establishing a new or modified water treatment programme. Here testing should initially be carried out weekly and the frequency reviewed when it can be shown that the cooling tower system is under control.
  • If a legionella-positive sample is found, more frequent testing may be required as part of the review of the system risk assessment, to help establish the source of the contamination and when the system is back under control.
  • Where the legionella risk assessment recommends more frequent legionella testing is needed, for example if the tower is located close to a hospital or care home (susceptible populations).

Often, a complete shut down is not required for water sampling to take place. Best practice is that the legionella sampling is done at the same place, at the same time of day, at specified periods to allow for realistic comparisons.

Any changes detected during water sampling might be the first indication that the water systems are out of microbial control and that maintenance issues are developing with your cooling tower. Those people in your organisation responsible for carrying out the water testing and record keeping should be in close contact with the water treatment contractor or in-house maintenance team so that they can quickly alert them to any problems so that remedial actions can be taken as soon as possible.

Minimising disruption caused by cooling tower maintenance

Some degree of disruption is inevitable when carrying out proactive maintenance or cooling tower repairs, but this scheduled disruption should be weighed against the inconvenience of having to shut down your facility because the towers have become contaminated with Legionella bacteria, they have developed a fault or even failed.

Many businesses choose to schedule their cooling tower maintenance for weekends, when they are not being used or at periods of the year when the factory shuts down to permit maintenance throughout the whole plant, not just on the cooling towers.

Spares and replacement parts

It also makes sense to keep a stock of the spare parts which are most commonly replaced during maintenance on site, or ask Water Treatment Services to stock them for you so they are available within hours when needed.

Despite what the original manufacturers of your cooling towers might tell you, it’s rarely necessary to buy original parts from the manufacturer as compatible parts will work just as well, as long as they are made to the same or better quality standards. Having a skilled in-house maintenance team, or using a specialist cooling tower contractor like Water Treatment Services to carry out the tower maintenance and servicing each time will also cut servicing time as technicians become familiar with the set-up of your cooling systems and its quirks.

Specialist water cooling tower maintenance and repair solutions

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained technicians, engineers and water treatment specialists, we can offer professional cooling tower maintenance, repair and servicing solutions to businesses throughout the UK and Ireland.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

More information about our indoor air quality services … here →

Water Tank Relining

Tank Relining, Coating & Repair

Water Tank Lining, Coating & Repair Solutions

Tank relining, coating and repair

Cost effective solutions for defective and leaking tanks.

Water Treatment Services is a leading UK water and environmental engineering specialist offering expert water tank relining, coating and refurbishment solutions for the repair of defective and leaking water storage tanks, cooling towers, containment bunds and other liquid retaining structures.

Our expert tank reline and repair solutions use a technically advanced, high performance polyurethane coating system that will quickly breathe new life in to failing and dilapidated tanks with the minimum of disruption.

Our specialist solvent free coating system offers exceptional durability, is WRAS approved for potable water, and is suitable for tanks made from most types of material, including glass reinforced plastic (GRP), concrete and steel. We are so confident in the long lasting performance of our coating system that we guarantee it for up to 15 years for complete peace of mind.

Water storage tank reline and repair solutions

Our specialist water storage tank lining, protective coating and repair solutions offer a number of important benefits including:

  • Cost Effective

    Lining can be significantly more cost effective than removing a failing or leaking water tank. It also means that the life of existing retaining structures can be extended significantly.

  • Not Just Water Tanks

    Whilst our lining system is typically used for tanks containing water, it is also suitable for many other types of tanks and liquid retaining structures including fuel oil tanks and storage vessels, containment bunds, fire sprinkler tanks and cooling towers.

  • Quicker & Safer

    Repair and reline works are carried out by experienced specialists allowing projects to be completed quickly and efficiently to reduce business disruption.

  • Temporary Water Supply

    Where necessary we can provide a temporary water supply during the course of the works to ensure continuity and minimise disruption.

  • Corrosion & Chemical Resistant

    Our specialist polyurethane coating system will prevent further corrosion and offers excellent chemical resistance.

  • Bacterial Control

    Our seamless coating system cures to form a smooth, tough finish to provide long term protection against microbial colonisation of tank linings from Legionella, Pseudomonas, biofilm and other waterborne pathogens.

  • WRAS Approved

    Specialist solvent free polyurethane coating system is WRAS approved for use in potable water applications.

  • Structural Movement

    Our coating system cures to form a tough but flexible finish capable of accommodating structural movement.

  • Easy to Maintain

    Fast curing protective coating forms an incredibly tough, durable finish for easy maintenance and cleaning.

  • 15 Year Guaranteed Performance

    Our coating systems are guaranteed for up to 15 years for complete peace of mind.

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained engineers and tank coating specialists we can offer professional water tank relining and repair solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our tank repair and refurbishment solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

Should you replace your leaking water tank or opt for a repair and reline solution?

Businesses of all sizes, across all industry sectors use and maintain water tanks, which are as diverse in type and size as the business that own and operate them. It’s essential for safety and efficient running of the business that these tanks are well-maintained and adhere to current legislation covering the water regulations and health and safety matters. However on the ball your maintenance teams are with your water treatment controls, there is no getting away from the fact that over time your water tanks might spring a leak or start to rust and begin to cause you serious operational issues. So the question is… do you replace your leaking water tank or opt for a repair and reline solution?

What is tank relining?

If you use any of the various types of water tank in your buildings or as part of your processes and have started to notice leaks, staining or corrosion then you may have a problem that needs investigation to prevent further deterioration, water damage, microbial contamination and even disruption to your business operations.

Fortunately there’s no need to replace failing tanks. This is often the last resort option, and can be exceptionally costly. Repairing or relining, as the name suggests involves reusing your existing tank and simply applying a new, robust internal lining system formed using a high performance polyurethane coating that will last for many years to come.

What types of tanks can be relined?

Relining is typically used for tanks containing water, but is also suitable for many other liquid storage vessels. The types of tanks suitable for our protective coatings are diverse and include fuel oil tanks and storage vessels, sectional water tanks, process tanks, liquor tanks, containment bunds, potable water tanks, fire sprinkler tanks and cooling towers.

Our specialist relining process is suitable for tanks made from most types of material, including glass reinforced plastic (GRP), concrete and steel.

  • Sectional Steel Water Tanks
  • Glass Reinforced Plastic (GRP)
  • Concrete
  • Flat Steel
  • Attenuation Tanks
  • Effluent Tanks
  • Interceptors
  • Containment Bunds
  • Fire Sprinkler Tanks
  • Cooling Towers

What are the risks from failing and leaking water tanks?

Tanks which have begun to fail suffer from corrosion, deteriorating joints and seals. They may also develop microscopic surface pits, cracks and fissures to their internal surfaces allowing bacteria (Legionella, Pseudomonas) and biofilm to colonise the water system. This colonisation can have a significant impact on water quality, system performance and safety.

If you have procedures in place to monitor and test the water flowing through your systems, the first indications that your tanks may have developed issues could be evident in the testing results. Bacterial counts may have started to rise, or you may get persistent Legionella positives. You might also start to spot pools of water below or adjacent to the tanks, surface staining or there may be sediment building up on the bottom of the tanks.

Less obvious indications are signs of corrosion on bolts or other metal components of your tank, biofilm (slime) may also be evident inside the joints and on internal surfaces of the tank. Any of these signs can indicate that your tank is past its best and it is time to think about either replacing it, or having it professionally relined.

Remember – If you delay over the decision about any tank reline and repair works, it might get to the stage where relining is no longer an option and you have to replace the whole thing. Is this happens Water Treatment Services offer a full tank replacement service and our specialists will review all options with you to identify the most appropriate, cost effective solution.

What are the benefits of water tank lining?

There are several advantages in repairing and lining an existing water tank with our high performance polyurethane coating system, and they include:

Cost effective alternative to tank replacement

Cost is the obvious main advantage, as a tank relining solution can be significantly more cost effective than removing a failing tank, buying a replacement, installation and recommissioning back in to service.

Versatility

Our specialist tank lining system is typically used for water storage tanks, it is also suitable for many other types of tanks and liquid retaining structures including fuel oil tanks, storage vessels, process tanks, liquor tanks, interceptors, containment bunds, fire sprinkler tanks and cooling towers.

Quicker and safer

It’s also safer and quicker too, with relining works being carried out by our experienced specialists, works can be completed quickly and efficiently, reducing down-time and business disruption to a minimum.

Temporary water supply

Where required we can provide a temporary water supply for the duration of the works to ensure continuity and minimise disruption.

Corrosion and chemical resistant

Our specialist polyurethane coating system provides long term protection against further corrosion and sediment issues, and offers excellent chemical resistance.

Improved microbial control

Our seamless tank reline system cures to form a smooth, incredibly tough finish that will help to combat microbial colonisation and contamination of tank linings from Legionella, Pseudomonas, biofilm and other waterborne pathogens.

WRAS approved

Our specialist solvent free polyurethane coating system is WRAS approved for use in potable water applications.

Accommodates structural movement

Our coating system cures to form a tough, flexible finish capable of accommodating structural movement to guard against settlement and expansion cracking.

Reduced maintenance

Fast curing to form an incredibly tough, robust finish for easy maintenance and cleaning.

Guaranteed performance

Our polyurethane coating systems are guaranteed for up to 15 years for complete peace of mind. This is more than the typical guarantee when you buy a brand-new tank.

How are tanks relined?

Depending on the size of the water tanks being refurbished and relined, the entire process can safely be completed surprisingly quickly. Certainly much quicker than if they were to be removed and replaced with new tanks.

After all site inspections and safety risk assessments have been completed the first stage of the process is to drain the water from the tank and inspect the structural integrity and condition of the interior surfaces, components, joints etc.

  • Good surface preparation is essential

    The relining process works best when there is a clean, stable, dust free substrate for the new polyurethane lining to adhere to. If the interior of the tank is in particularly poor condition, blasting may be carried out on a steel tank, or the surface of a concrete tank may be etched to provide a better key for the new tank lining.

  • High performance polyurethane coating

    Once the substrate preparations are complete the high performance, polyurethane coating system is then applied to the interior of the tank surfaces and allowed to cure. Our specialists will use a high-pressure spray to apply multiple layers of our coating system to the inside surfaces of the tank, leaving it to cure and then repeating the process as required until a suitable membrane finish is achieved.

    For smaller tanks, the polyurethane coating may be carefully painted on rather than sprayed. Once the new lining has achieved a full cure, the tank is thoroughly inspected and then refilled.

Why use polyurethane coatings?

The experts at Water Treatment Services use a high performance, solvent free polyurethane coating system that has been developed specifically for the repair and refurbishment of failing and leaking water tanks, cooling towers, fire sprinkler tanks and other liquid storage vessels.

Our high performance polyurethane coating systems offer a number of market leading benefits including:

  • WRAS & DWI approved for potable water applications.
  • Fast curing to form an incredibly tough, robust finish for easy maintenance.
  • Excellent chemical resistance.
  • Safer solvent free technology with no taint or odour.
  • Tough but flexible finish capable of accommodating structural movement.
  • Guaranteed performance – up to 15 year guarantee.

The risks from Legionella bacteria in cold water tanks

In the UK one of the primary health and safety responsibilities businesses using water have is to guard against the risks from Legionella bacteria. It is a legal requirement underpinned by the Health and Safety at Work etc Act 1974, the Control of Substances Hazardous to Health Regulations 2002, and the Management of Health and Safety at Work Regulations 1999.

Legionella is a bacteria which thrives in engineered water systems, especially in water storage tanks and pipework which are poorly maintained or have begun to corrode.

Legionella bacteria can cause Legionnaires’ disease, a severe type of pneumonia which can prove fatal in vulnerable groups. Companies which use and operate water storage tanks, cooling towers and other types of water system have a legal obligation under UK health and safety law to protect their staff and others from the risks associated with Legionella bacteria and Legionnaires’ disease. The Health and Safety Executives Approved Code of Practice ACOP L8 and their safety guidance HSG274 are essential reading for business owners and operators.

To comply with the law businesses must carry out a legionella risk assessment, they must appoint someone to be responsible for controlling the risks, monitoring water quality, and taking steps to resolve problems as soon as they are made aware of them. A water tank which is poorly maintained, has started to corrode, has significant surface imperfections or is leaking is the ideal breeding ground for Legionella bacteria and other waterborne pathogens. Taking steps to have it relined isn’t just a cost-saving exercise for your business, it’s a legal requirement too.

Specialist water tank relining and repair solutions

Contact Water Treatment Services today to find out more about our specialist water storage tank repair and relining solutions.

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained engineers and tank coating specialists we can offer professional water tank coating and repair solutions to businesses throughout the UK and Ireland.

Contact Water Treatment Services today to learn how our tank relining and repair solutions can help you. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

For more information about the Drinking Water Inspectorate (DWI) … here →

Swimming pool water testing

Swimming Pool Water Testing

Water Testing for Swimming Pools, Spas & Hot Tubs

Swimming pool water testing

Specialist testing and analysis for pools, spas and hot tubs.

Water Treatment Services is a leading water and environmental engineering specialist offering a range of laboratory based microbiological analysis and swimming pool water testing solutions (including tests for spas and hot tubs) to businesses and private individuals throughout the UK and Ireland.

Our specialist laboratory procedures include tests for a range of common pathogens found in pool waters including E. coli, Pseudomonas aeruginosa, Total coliforms, TVC/Aerobic colony counts, Legionella bacteria and other less common organisms that can contaminate pools.

If you’re one of the many UK businesses or private households who own or operate a pool, hot tub or spa, then you’ll already know that maintaining the quality of the water in your pool is something which can’t be ignored.

Specialist pool water analysis and testing

Our specialist laboratory water analysis solutions for pools, spas and hot tubs include:

  • Laboratory Water Testing & Analysis

    Specialist laboratory analysis of water from swimming pools, spas and hot tubs. Test for an extensive range of chemical and microbiological parameters.

  • Microbiological Water Analysis

    Laboratory analysis for a range of microbial parameters including E. coli, Pseudomonas aeruginosa, Total coliforms, TVC/Aerobic colony count, Legionella bacteria and other waterborne pathogens that can contaminate pool waters.

  • Chemical Analysis

    Testing for specified chemical parameters in water.

  • In-field Sampling.

    Expert in-field water sampling.

Full national UK coverage

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of trained engineers and technicians we can offer professional, cost effective pool water testing, in-field sampling and laboratory microbiological analysis services across the UK and Ireland.

Contact Water Treatment Services today to learn how our professional water quality analysis, testing and sampling solutions can help maintain pool water quality, safety standards and regulatory compliance processes. To speak with one of our experts call us on 0330 223 31 31 or simply use this button.

Why test swimming pool water?

Unlike other water systems found in homes and commercial premises where the water is flushed or drained away after each use, swimming pools, hot tubs and spas could be considered as a re-circulating water system where the water is retained and re-used many times over. If you’re not testing the chemical and microbial water quality regularly, taking steps to maintain balance and keep it clean, issues such as pH and water clarity can change, and more worryingly bacteria can start to grow rapidly.

What bacteria can contaminate a pool, spa or hot tub?

Bacteria such as E. coli, Pseudomonas aeruginosa and Legionella thrive in warm, poorly or untreated water and have the potential to make people using the pool or spa very ill. Don’t assume that water which appears crystal clear is clean and safe to use – the types of bacteria which can grow in water are invisible to the naked eye.

UK laws dealing with water quality testing in pools and spas

UK health and safety laws dealing with swimming pool and spa water quality, testing and treatment really only come into play if you’re running a business such as a leisure centre, gym or hotel, or the pool is in a holiday property which is let to paying guests.

Owners and operators of pools and spas need to ensure sure that the water quality and treatment programmes are effective and meet current standards. Although the law might not apply to domestic pools and spas, they provide excellent guidelines and standards which it makes sense to read, understand and comply with.

For more information both the Health and Safety Executive and the Pool Water Treatment Advisory Group (PWTAG) provide excellent guidance to help pool operators comply with health and safety law.

Microbial water testing

It is very important that regular microbial analysis is carried out to ensure the effectiveness of the water treatment programme is maintained and the pool is safe to use. Specialist microbial analysis is carried out in the laboratory, not in-field.

Swimming pool analysis

Swimming pools operated as part of a business should be tested on a monthly basis. Microbial testing of privately operated pools is at the owner’s discretion, however we recommend the same testing frequency.

Our swimming pool microbial laboratory testing suite includes for the following:

  • E. coli

  • Pseudomonas aeruginosa

  • Total coliforms

  • TVC/Aerobic colony count at 37C

Frequency – These tests should be carried out on a monthly basis.

Hot tubs and spa pool testing

Hot tubs and spa pools typically contain lower volumes of water and operate at higher temperatures than swimming pools. These factors can increase the potential for bacterial growth in the water, including the risks from Legionella bacteria and other waterborne pathogens.

Our hot tub and spa pool microbial testing suite includes for the following:

  • E. coli

  • Pseudomonas aeruginosa

  • Total coliforms

  • TVC/Aerobic colony count at 37C

  • Legionella bacteria

Frequency – These tests should be carried out on a monthly basis, or when the spa is first used or recommissioned, after a report of ill-health, if there are problems of contamination, or if there have been alterations in the treatment/maintenance programmes.

If there are reports of ill-health from bathers further testing may also be required for other organisms including Staphylococcus aureus, Cryptosporidium, Giardia and possibly viruses.

Monitoring pool balance and pH

In addition to routine microbial analysis of pool waters regular chemical testing should also be carried out. One of the most important chemical parameters you’ll need to keep under control in your swimming pool or spa is the pH of the water, often referred to as the “balance”. This is a way of determining how acidic or alkaline the water is.

Adding pool chemicals to the water can often change the pH levels and may prevent other chemicals from working as well as intended. pH is measured on a scale of 0 to 14. 0 is an extremely strong acid, 14 is strongly alkaline, and at the mid-point, 7, the water is neutral.

Experts agree that the ideal pH range for water in swimming pools or hot tubs is between 7.2 and 7.6. This is a range which is comfortable for skin and eyes, allows chlorine added to the water to work properly, and within this range water scale problems are unlikely.

If the water pH starts to fall too low into the “acidic” range, you may find that the water becomes irritating to skin or eyes, pool equipment including heater elements start to corrode. You may also start to notice a build-up of minerals around the edges of the pool itself.

On the other hand, if the water becomes too alkaline, you might notice skin irritation, but also water clarity reduces and scale starts to form on the sides of the spa or pool.

In the UK, mains water from the tap will have different pH levels depending on where you are in the country, how your water is treated and local geology – what type of rocks the water flows through on its way to your local reservoir. It’s therefore impossible to set-out a standard water treatment regime which works for everyone, as the water in tubs will tend to be different from the start.

Monitoring chlorine levels in your swimming pool

Measuring levels of chlorine or your biocide of choice in pool water is also important. Chlorine is currently the most popular biocide for the control of bacteria in pools but needs to be maintained at optimum levels – enough to kill any bacteria in the water, but not too much to cause health issues for bathers or accelerated corrosion of the equipment and other components used in the pool or spa.

Testing chemical parameters

There are various ways of testing the essential chemical parameters in your pool water including pH and chlorine (usually free or total chlorine).

  • pH testing

    Litmus paper test strips will measure pool water pH and are cost-effective, quick and simple to use. They work by turning a different colour depending on the pH of the water so you can easily read the result off a chart.

    Tablets are also available to measure pH, they work by dissolving in water and will change colour to indicate the result – they are also easy to use and inexpensive.

  • Chlorine testing

    Various DPD tablets (DPD1, 2, 3 and 4) are available and will measure chlorine levels – usually free and total chlorine. They are used with a comparator or a photometer to ensure the correct levels of chlorine are present in the pool water.

Electronic meters are also available that will measure pH and chlorine levels. These are simple to use but more costly than test strips and tablet methods.

Please remember that there is no “best” way of testing the chemical parameters of your water; the key is to understand why you should be testing, how to do it correctly, and to do it regularly.

Expert swimming pool water testing and microbiological analysis

Contact Water Treatment Services today to find out more about our laboratory water analysis services including microbiological testing of pool, spa and hot tub waters.

With offices in London serving the South and South East England, Manchester (North West), Birmingham (Midlands), Bristol (South East England and Wales), Leeds (North and North East) and Glasgow (Scotland), supported by regional teams of specially trained technicians and consultants we can offer professional, cost effective microbiological water analysis solutions across the whole of the UK and Ireland.

Contact us today for more information or for your FREE, no obligation quote.

You may also be interested in…

Borehole water wells
Trade effluent and liquid waste management
Cooling tower maintenance
10 facts about water boreholes
Ductwork cleaning
10 causes of industrial equipment-failure
How Microbiological Contamination Affects Indoor Air Quality
Water Tank Relining
Swimming pool water testing
Expansion vessels and legionella risks

Further reading…

More information about managing health and safety in swimming pools from the Health and Safety Executive (HSG179) … here →

Expansion vessels and legionella risks

Guide to Expansion Vessels & Legionella Risks

In this expert guide the specialists at Water Treatment Services examine the use of expansion vessels in pressurised heating systems, the potential legionella risks arising from their use and what can be done to manage those risks in line with current health and safety guidance from the Health and Safety Executive including ACOP L8 and HSG274 Part 2.

Read more

HSE ACOP L8 Download

HSE ACOP L8 Download – Guidelines for Controlling Legionella in Water Systems

The Health & Safety Executives Approved Code of Practice ACOP L8 – “Legionnaires’ disease: The control of legionella bacteria in water systems” provides guidelines for those with responsibility for the control of legionella in water systems. This includes dutyholders, employers, those in control of premises including landlords and those with health and safety responsibilities for others. If that describes you, or if you are involved with the control of legionella at your place of work then get up to speed by downloading your complimentary copy of the HSE’s ACOP L8 now – simply use the download button below.

Read more

Being a Duty Holder for Legionella – What Does it Mean?

Being a Duty Holder for Legionella – What Does it Mean?

Here we take a look at what it means to be the duty holder, responsible for the control of legionella and Legionnaires’ disease risks in a business. In the UK legionella control is just one of the many issues which business owners, directors and senior managers have to be on top of – it’s a legal requirement.

Read more

E.coli water testing for hot tubs and swimming pools

What is E.Coli & Why Testing Hot Tubs & Swimming Pools is a Good Idea

It’s not just Legionella or Pseudomonas bacteria that you have to worry about lurking in your water. Escherichia Coli or E.coli is another bacteria which just loves living in man-made water systems like hot tubs, spas and swimming pools. It will breed rapidly given the right conditions which is why regular water testing is important. Legionella bacteria does best in stored or stagnant water systems where the temperatures are warmer, but E.coli prefers hotter temperatures that are sustained over longer periods.

Read more