All well washers are installed with RPZ Devices in case a pumping station breaks down, and the sewerage level rises above the well washer, causing backflow down the water supply line. A …

Reduced Pressure Principle (RPZ): An acceptable RPZ device contains a minimum of two independently-acting check valves, with an automatically-operated pressure differential relief …

Designed for use in health hazard cross-connections and continuous pressure applications subject to backpressure or backsiphonage incidents, such as containment at the main service …

Apr 30, 2025 · Many people ask why an RPZ valve installation has become standard in newer plumbing projects. Unlike a simple check valve or dual check setup, a Reduced Pressure Zone …

The 375 Reduced Pressure Principle Backflow Assembly is utilized where a potential high health hazard exists and is ideal for use when lead-free valves are required protecting against both …

Nov 2, 2023 · Discover why reduced pressure zone assemblies (RPZ Valves) are extremely important and why municipalities and engineers are requiring that they be used.

Feb 20, 2025 · Learn about Reduced Pressure Zone (RPZ) backflow preventers, their operation, applications, and the importance of regular maintenance to protect your water supply from …

A Reduced Pressure Zone (RPZ) Assembly uses a combination of check valves and relief valves to prevent backflow in an irrigation system. These allow water to flow in only one direction: …

Nov 20, 2025 · Did you know a single reduced pressure zone (RPZ) assembly can discharge hundreds of gallons per minute during a backflow event? For plumbing engineers, that’s not …

RPZ assemblies (RPZ), also sometimes called a reduced pressure principle assembly, can prove to be the most secure and reliable of all backflow prevention devices.