Hose Backflow Preventers

A hose end vacuum breaker can start leaking for any number of reasons, but the most common reason is usually a worn or damaged washer. An easy fix is to replace the rubber washer inside the backflow preventer. If you suspect that the device isn’t properly tightened, try using a wrench to maintain a strong connection. If you suspect that the unit is cracked, the entire backflow preventer may need replacement.

A vacuum breaker is a type of backflow preventer, but they are not the same thing. Traditionally, when someone is talking about a backflow preventer, they are using it as a general term for any device that stops contaminated water from flowing backward into a clean water supply. A vacuum breaker specifically protects against backflow. Other types of backflow preventers include Reduced Pressure Zone (RPZ), Pressure Vacuum Breaker (PVB), and Double Check Valve (DCV) devices.