RPZ FAQs: Testing

Our maintenance technician tests all our RPZ valves, but only these, can they become recognised on a site specific basis?

Yes, the RPZ AIM makes provision to recognise someone on a site specific basis. However, the local water undertaker has will have to be satisfied they are competent so will require further information before accepting the test report submitted by them as valid. For example, the company will be likely to be asked to demonstrate:

  • The tester has a qualification in RPZ valve commissioning and/or compliance testing recognised by the local water undertaker.
  • Their test equipment is calibrated by a pressure calibration service accredited by UKAS.
  • The company has appropriate liability insurance.

The water undertaker may also wish to witness the technician testing.


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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.