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Full Water Systems Chlorination

A full system or pipework chlorination is the process of disinfecting and pre-commissioning new private water supplies within the building prior to handover or an existing system.

The recognised standard for undertaking this work is BS 8558 alongside any additional requirements of certain water authorities.

If these standards are not met, you may be liable to prosecution should an outbreak occur, a full system chlorination should be carried out on any new system installation or when a system has been left for a prolonged period of time with no water turnover, it is vital to carry out a full system chlorination of the system if the system has been left with no water turnover and microbiological sampling and analysis carried out.

Heating and chilled systems also have pre-commission cleaning requirements.

When is a pipework disinfection required?

  • In any new installations as part of a building's commissioning procedure
  • Where major extensions or alterations have been carried out to the water system
  • If a system has been left with no water turnover for a prolonged period of time
  • If contamination within the water system is suspected
  • If the water system has not been in regular use and therefore the pipe work has not been flushed regularly


Useful information about Legionella and what it means for your business.

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Call our experts on 0333 355 1875 to discuss your water management needs.