A house or business or cyanide plant can use all the water it wants, but once the water has passed through the backflow preventer, it will not be allowed back into the water supply. This peace of mind is what municipalities and engineers are requiring more and more to protect our delicate water supply.īackflow preventers work by letting water flow through them in one direction, but prevent water from flowing back through them. If the relief valve is dumping or spitting out any amount of water, something is not right and maintenance on the valve is required.

If you walk up to an RPZ and no water is dumping out of the relief valve, you know the backflow preventer is working properly. They work like a double-check backflow preventer, but they also have an intermediate relief valve that opens to the atmosphere if both check valves should fail. RPZ backflow preventers consist of two independent check valves. WHY IS AN RPZ VALVE BETTER?Ī Reduced Pressure Zone (RPZ) lets you know the valve is functioning properly. If you live in an area where single- or double-check valves are acceptable, with their low-level hazard protection, that may soon be changingSo, let’s take a look at why an RPZ is safer and how to install one. In fact, many communities now require their use on all domestic and fire service lines. That’s why municipalities and engineers across the country require the use of these types of backflow prevention devices for new construction.

RPZ valves provide the highest level of protection for your water supply. Specifically, an RPZ is installed onto your plumbing system to protect both your drinking water as well as the municipality’s water supply. They’re used to keep contamination or pollution out of your water. Reduced pressure zone (RPZ) assemblies are extremely important.

Cary safe models