How does an RPZ backflow preventer work?
RPZ backflow assemblies consist of two independent check valves. Backflow preventers work by letting water flow through them in one direction, but prevent water from flowing back through them in a reverse direction. This is how the water supply is protected.
Is an RPZ the same as a backflow preventer?
A Reduced Pressure Zone (RPZ) lets you know that the valve is working properly. They work like a double-check backflow preventer, but they also have an intermediate relief valve that opens to atmosphere if both check valves should fail.
What does a RPZ valve protect against?
Reduced Pressure Zone (RPZ) Backflow Preventer – Commercial An RPZ valve is one of the safest and most reliable backflow preventer valves available. RPZ valves offer protection against back pressure and siphonage in order to protect the mains water supply and drinking network from contamination.
How do RPZ valves work?
The RPZ valve works by ensuring that the water entering the downstream system is at a lower pressure than the incoming supply, typically reducing it by 0.7-1bar, using a combination of check valves and a relief valve to monitor and maintain the lower pressure.
What does Rpz stand for in plumbing?
Reduced pressure zone assemblies, also known as RPZ valves, are extremely important. They’re used to keep contamination or pollution out of your water. Specifically, these devices are installed onto your plumbing system to help protect both drinking water and the city water supply.
Where are RPZ valves required?
RPZ valves are required when a house or building is equipped with an irrigation system, fire suppression system, or a large boiler (hereinafter referred to as Systems). Contaminants can enter an irrigation system from fertilizer or pesticides that are sprayed onto lawns.
How do you perform a backflow test?
When testing the device, the backflow certified plumber will first turn off the downstream shut-off valve and wait for a few minutes, and then he’ll test the pressure in the system by hooking up test kit hoses. The plumber is basically looking for areas where the pressure isn’t what it should be.
