Common RPZ Valve Problems
The faults that cause RPZ valves to fail a test or discharge — and what is needed to put them right.
Scale and debris build-up
Hard water and debris can prevent the check valves or relief valve from seating properly, causing weep or test failure.
Fix: A clean and service of the internals usually restores correct operation.
Worn seals and seats
Over time the rubber seals and seating faces wear, allowing leakage past the check valves.
Fix: Replacement of the seal kit and re-testing resolves most wear-related failures.
Relief valve not opening
If the relief valve sticks, the valve cannot discharge under fault conditions and protection is lost.
Fix: We service or replace the relief valve assembly and confirm the opening pressure on re-test.
Incorrect installation
Valves fitted the wrong way round, or without the required clearances, cannot be tested or may not protect correctly.
Fix: We correct the installation and re-test to confirm compliant protection.
Continuous discharge
A valve that constantly discharges water is usually failing and needs attention.
Fix: We diagnose the cause and carry out the service or replacement needed.