What is RPZ backflow?

A backflow device is also known as an RPZ valve. RPZ stands for Reduced Pressure Zone.  If a drop in city or building water pressure occurs, the RPZ valve will open up, dumping water out rather than allowing the potentially contaminated water to back-flow into the water supply.

Backflow can occur for a number of different reasons. In a typical plumbing system, pressure is maintained to keep the clean water flowing into the home or building. Various problems, such as frozen pipes, pipe leaks, or even unexpectedly high demand can cause this system to fail and backflow can occur. It is also important to test for backflow during major changes to the plumbing system, such as a home remodel. Backflow preventers are designed to protect people from contamination, but backflow testing is still critical to be sure that the system is working well. We can help customers by testing their water supply to see if any contamination is occurring. We can also help customers isolate the problem and determine the best way to correct it.