What's a RPZ valve?
A reduced pressure zone valve or RPZ valve is a backflow prevention device used to protect the drinking water supply. In the United Kingdom, wherever a significant health hazard (fluid category 4) is identified in a plumbing system, backflow protection is required by law. One method to protect against this level of risk is to install an RPZ valve.
Key things to remember with an RPZ valve:
- You must notify water undertaker to gain consent to install the RPZ
- The RPZ valve must be installed in line with the approved installation method (AIM)
- The RPZ valve must be tested annually (as a minimum) by an approved tester
Why do I need to test my RPZ valve?
Much like the MOT on a car, an RPZ valve must be tested annually by law to ensure it is operating correctly. Remember, the valve is installed to prevent contamination of the drinking water supply, so it is vitally important that it works properly.
The test requires specialist equipment and can only be completed by an approved RPZ tester.
What happens if I fail to get my RPZ valve tested?
Yorkshire Water have a legal duty to enforcement of the water supply (water fittings) regulations 1999 and this includes ensuring all RPZ Valves comply with the approved installation method (AIM). In the event a RPZ valve is not tested as required, Yorkshire Water may issue an enforcement notice under Section 75 (1) of the Water Industry Act 1991. This notice gives Yorkshire Water statutory powers to visit your premises, carry out the test, and recover its reasonable expenses from you.
Where Can I find further information?
For more information on RPZ valves please check out the FAQ page on Water Regs UK website.
RPZ installation and testing documents
For approved testers, please download and complete the required documentation below and email to rpz@yorkshirewater.co.uk.
RPZ Valve Application to Install/Relocate
Combined Commissioning and Compliance Test Report Form