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Clean and disinfection

Sets of cooling towers in building

Costain is perfectly positioned to undertake any cooling tower cleaning contracts throughout the UK and mainland Europe, holding many accreditations and qualifications, including registration with the Legionella Control Association.

Cleaning and disinfection of a cooling tower is best achieved by removing the cooling tower pack. The pack constitutes the majority of the wetted surface area within a cooling tower system, making it one of the main areas where scale, debris and biofilm are likely to accumulate.

Where it is not reasonably practicable to remove the pack from the cooling tower, foam cleaning of the pack in situ can be conducted. We use Pack-Clean, which is designed to clean in situ by dissolving scale deposits and disinfecting cooling tower surfaces. On lightly scaled and fouled systems it replaces packing removal and is a method for lengthening packing lifespan. 

Our cooling tower cleaning services guarantee that your plant and equipment are operating within the appropriate laws, guidance, and legislation. Upon completion, a ‘Certificate of Cleaning’ is issued, as required under Section 68(g) of the Health and Safety Executive’s Approved Code of Practice and guidance.



  •  Cleaning and disinfection procedures are in full compliance with ACoP L8 document and Guidance Legionnaires Disease; The control of Legionella bacteria in water systems, BS 6700:1997 and EC Directive 80/778/EEC.
  • All Costain cleaning and disinfection technicians are experienced and qualified, having undertaken all the required training.
  • The Costain team has experience working in many industries and environments and are flexible to work under site or local management rules and instructions.
  • Cleaning and disinfection can be employed as a standalone service, or we can incorporate it into a wider repair and maintenance regime.