When Does New Pipework Require Chlorination?
Understanding when new pipework requires chlorination helps contractors and facilities teams plan commissioning correctly. This guide covers the common scenarios where chlorination is required for commercial water systems.
New-build water systems
Newly installed water systems require chlorination before being brought into use. During installation, pipework can be exposed to contamination, so disinfection ensures the system is safe and compliant at handover.
Modified or extended pipework
When existing pipework is modified or extended, the new sections should be chlorinated before being connected and brought into use. This ensures any contamination introduced during the works is removed.
Systems returned to use
Water systems that have been out of use for an extended period may require chlorination before being brought back into service. Stagnant water and unused pipework can harbour bacteria that chlorination addresses.
Commissioning and handover
Chlorination is a standard part of commissioning new commercial water systems. A chlorination-qualified contractor carries out the disinfection and provides documentation to support safe handover to the building owner or facilities team.
Ongoing water safety
Beyond initial commissioning, facilities teams may arrange periodic chlorination as part of water safety management, particularly where systems are modified or where risk assessments indicate a need.