Last updated: February 2024

RPZ FAQs: Testing

What is a valid commissioning/compliance test report?

Before an RPZ valve can be brought into service the local water undertaker will require all newly installed RPZ valves, including replacement RPZ valves, satisfy both on-site commissioning and compliance testing, plus where required flushing and disinfection.

To be considered by the local water undertaker as being valid a test report must be:
  • Completed, signed and dated by a RPZ tester they consider to be competent using calibrated suitable test equipment
  • Submitted in an acceptable format
  • Provide the minimum information required
  • Be received by the local water undertaker within 10 working days of test – unless the valve fails test in which case specific reporting requirements apply.

For further information please refer to 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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