A Reduced Pressure Zone (RPZ) Assembly is a type of backflow prevention device with two independent check valves and a relief valve, together ensuring contaminants don’t enter a clean water supply. Oftentimes, RPZ devices must be tested annually by a certified professional to ensure proper function, so make sure your RPZ is flowing smoothly with backflow parts from Sprinkler Warehouse. We supply several different backflow repair kits that include bushings, O-rings, and more.
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RPZ vs. Double Check Valve Assembly (DCVA)
The main difference between a reduced pressure zone assembly and a DCVA is their level of protection against backflow and where they are used. RPZ assemblies provide superior protection by using a relief valve to discharge water if both check valves fail. DCVAs have two check valves but no relief valve, making them more suitable for low-hazard situations. Both RPZs and DCVAs use seals, springs, and O-rings in their check valves to ensure proper function. However, the specific designs of these components often vary.
RPZ Part FAQs
What is causing my RPZ to stop working?
After years and years of use, it’s common for backflow preventers to have worn or damaged internal components. Most often, you’ll find that rubber seals, springs, and O-rings inside the RPZ have worn out, causing leaks or failure. The solution is to inspect and replace worn parts as needed.
How long does an RPZ last?
With proper maintenance, an RPZ backflow unit can last 10 to 15 years. However, internal parts (seals, springs, and check valves) may need replacement more frequently. Replacement backflow preventer parts will usually be less expensive than buying a brand new reduced pressure zone assembly, so try to become accustomed to light repairs.
Are these RPZ parts compatible with other backflow preventers?
Replacement RPZ parts are generally not interchangeable with other backflow preventers. Each brand designs its RPZ assemblies uniquely, meaning their internal parts, check valves, and relief valves may not fit other brands. But even within the same brand, different models and sizes of RPZs may have unique parts that are not interchangeable.
