RPZ FAQs: Testing

Do you need to join an approved contractor RPZ tester scheme?

I​t is not compulsory for RPZ testers to join an approved contractor scheme. Joining a scheme will however mean that a tester will not be asked to demonstrate:

  • They have satisfactorily completed 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.
  • They have appropriate liability insurance.

There may be other advantages to scheme membership, please refer to your local scheme for further information.


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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.