During the field test of a reduced pressure principle backflow prevention assembly, the differential gage reading cannot be lowered enough to get the relief valve to open, even after opening the gage needle quarter(1/4) turn. This implies that:
water is leaking past the # 2 shutoff valve.
There is a continuous discharge from the relief valve of a reduced pressure type backflow prevention assembly during a non-flow condition. The static pressure drop across the # 1 check valve is 2.3 psi . The malfunction is most likely:
# 1 check valve fouled
The differential pressure relief valve of an approved reduced pressure principle backflow prevention assembly must discharge water from the "zone" whenever the "zone" pressure is:
2 psi or less below the supply pressure
As per the manufacture the "buffer" between the actual 1st check valve pressure drop and the differential pressure relief valve opening point should be at least:
3.0 psi
The relief valve of reduced pressure principle backflow prevention assembly is observed discharging small "spits" of water intermittently. This condition is most likely caused by:
The upstream pressure is fluctuating
In testing a reduced pressure principle backflow prevention assembly, the first test to be performed and recorded shall be the:
Differential pressure relief valve
A new reduced pressure principle backflow prevention assembly has been installed and the initial test shows a relief valve opening pressure of 2.6 psi and a first check valve drop of 4.6 psi. What is most likely the cause of this condition?
CA slightly fouled first check valve
There is a continuous discharge from the relief valve of a reduced pressure principle backflow prevention assembly . The pressure drop across the # 1 check valve is 9.0 psi. The malfunction is most likely
Debris fouling the relief valve seat
Which of the following is used to properly field test a reduced pressure principle backflow prevention assembly?
Differential pressure gage
If water is continuously flowing from the relief valve port of a reduced pressure principle backflow prevention assembly it should be reported that:
The first check may be fouled