Backflow Prevention Assembly Tester
Backflow Prevention Assembly Tester
Primary consideration when deciding on DC or RP
Degree of Hazard
When testing an RP, the #1 SOV
is to be left open at all times
Containment Protection
Protects all consumers on a Public Water System
Vacuum
Any pressure less than that exerted by the atmosphere
Vacumm
Any pressure less than that exerted by the atmosphere
Backpressure & Backsiphonage
Backflow occurs because of what two things
maximum distance that an absolute vacuum breaker at sea level
will lift a column of water is
33.9 feet
This amount of absolute pressure could cause backsiphonage to
occur in a hydraulic system
10.5 psia
When testing DC and the #2 check valve is leaking you must
Repair the #2 check
Each check valve on a DC is designed to hold
1.0 psid
Maximum absolute pressure loss for a DC is
10 psi
Air Inlet on a PVB must open at or above
1 psid
When testing the PVB, the air inlet opens upon closing the #1 SOV
this is because the
#2 SOV is leaking
Backflow Prevention Assembly Tester
Primary consideration when deciding on DC or RP
Degree of Hazard
When testing an RP, the #1 SOV
is to be left open at all times
Containment Protection
Protects all consumers on a Public Water System
Vacuum
Any pressure less than that exerted by the atmosphere
Vacumm
Any pressure less than that exerted by the atmosphere
Backpressure & Backsiphonage
Backflow occurs because of what two things
maximum distance that an absolute vacuum breaker at sea level
will lift a column of water is
33.9 feet
This amount of absolute pressure could cause backsiphonage to
occur in a hydraulic system
10.5 psia
When testing DC and the #2 check valve is leaking you must
Repair the #2 check
Each check valve on a DC is designed to hold
1.0 psid
Maximum absolute pressure loss for a DC is
10 psi
Air Inlet on a PVB must open at or above
1 psid
When testing the PVB, the air inlet opens upon closing the #1 SOV
this is because the
#2 SOV is leaking
