A Pressure Vacuum Breaker (PVB) is a backflow prevention device, similar to an atmospheric vacuum breaker (AVB), except that the PVB contains a spring-loaded poppet and may be used on high hazard applications and may have valves installed downstream.
A Pressure Vacuum Breaker (PVB) is a type ofbackflow prevention device, used to keep non-potable (or contaminated) water from entering the water supply. A PVB is similar to an atmospheric vacuum breaker (AVB), except that the PVB contains a spring-loaded poppet and may be used on high hazard applications and may have valves installed downstream.