Last updated: February 2024

RPZ FAQs: Testing

When is a commissioning test needed?

This is an on-site procedure to confirm a newly installed or repaired RPZ valve is installed and functioning in accordance with the requirements of the RPZ AIM.

It is required by water undertakers before an RPZ valve can be brought into service. It applies to all newly installed RPZ valves and any valves which have been relocated, replaced, had components changed or RPZ valve installation which have been dismantled in anyway.

Full details are provided in section 5 of the RPZ AIM.



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Uncontrolled if downloaded. This is informative, non-statutory guidance and intended for general guidance purposes only; it is subject to change.

Compliance with this information should not be relied upon as guaranteeing no enforcement action will be taken by water undertakers. Water Regs UK accepts no liability for loss, indirect or consequential loss arising from or in connection with this guidance document.

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