Hose bibb vacuum breakers consists of a spring-loaded check valve that seals against an atmospheric outlet when the water supply is turned on.
When the supply is turned off, the device vents to atmosphere, thus protecting against backsiphonage conditions.
A diagram of a hose bibb vacuum breaker is illustrated below along with a typical installation:
Standardized Information for Hose Bibb Vacuum Breaker
No information available at this time.