RPZ Valve Testing
Reduced Pressure Zone Valves provide a cost effective method of Backflow Protection.
RPZ valves require a Commissioning Test and a periodic Test by an ACCREDITED TESTER. Diamond Plumb Ltd provide a Nationwide TESTING SERVICE.
The RPZ Valve is a Type BA Verifiable Backflow Preventing Device with, as the name suggests, a Reduced Pressure Zone.
The REDUCED PRESSURE ZONE VALVE is a device which protects against BACKFLOW, providing cost effective protection against the contamination of MAINS cold water supply.
Double or Single non return valves (also called a check valves) should prevent backflow but when used with Mains water can be unreliable & fail due to debris found in the Mains. The design of the RPZ Valve is based on a Double Check Valve BUT with the important additional RELIEF Valve which will operate under Backflow conditions, DISCHARGING the potentially CONTAMINATED FLUID.