BACKFLOW TROUBLESHOOTING
QUIZ WITH COMPLETE SOLUTIONS
While field testing the check valve of a pressure vacuum breaker, water continues to
flow from the # 2 test cock . How do you proceed ? - Correct Answers -Open the bleed
off valve until the flow slows to a slight drip.
Well field testing the first check valve of a double check valve assembly, water
continues to flow from the site tube. How do you proceed? - Correct Answers -Observe
reading on gauge (first step). Open high side of bleed valve (second step).
While field testing the check valve of a spill resistant pressure vacuum breaker, water
continues to flow from the vent valve. What does this imply? - Correct Answers -Number
1 shut off valve is leaking.
While field testing the differential pressure relief valve opening point of RP, it is found
that the shut - off valve # 2 is leaking . How should the temporary bypass hose be
connected to compensate for the leak? - Correct Answers -Test cock # 1 to test cock #
4
While field testing the second check valve of a reduced pressure principle assembly,
high side pressure is applied through test cock # 4 and the gage reading begins to
increase. How do you proceed? - Correct Answers -Close the # 2 test cock.
While field testing the second check valve of a double check valve assembly, water
continues to flow from the site tube, you open the bleed off valve and a small amount of
water comes out of the bleed off valve and then stops. The gauge reading goes to zero,
and water continues to flow from the site tube. How do you obtain the proper reading for
the second valve check? - Correct Answers -Record the observed reading before the
bleed off valve was opened.
While field testing the second check valve of an RP, the high side pressure is applied
through test cock number 4 and the gauge reading begins to increase. What does this
imply? - Correct Answers -Back pressure is present along with a leaking number 2 shut
off valve.
When testing and SVB, upon closing the number 1 shut off valve the gauge reading
starts to decrease. What does this imply? - Correct Answers -Number 2 shut off valve
leaks with demand.
QUIZ WITH COMPLETE SOLUTIONS
While field testing the check valve of a pressure vacuum breaker, water continues to
flow from the # 2 test cock . How do you proceed ? - Correct Answers -Open the bleed
off valve until the flow slows to a slight drip.
Well field testing the first check valve of a double check valve assembly, water
continues to flow from the site tube. How do you proceed? - Correct Answers -Observe
reading on gauge (first step). Open high side of bleed valve (second step).
While field testing the check valve of a spill resistant pressure vacuum breaker, water
continues to flow from the vent valve. What does this imply? - Correct Answers -Number
1 shut off valve is leaking.
While field testing the differential pressure relief valve opening point of RP, it is found
that the shut - off valve # 2 is leaking . How should the temporary bypass hose be
connected to compensate for the leak? - Correct Answers -Test cock # 1 to test cock #
4
While field testing the second check valve of a reduced pressure principle assembly,
high side pressure is applied through test cock # 4 and the gage reading begins to
increase. How do you proceed? - Correct Answers -Close the # 2 test cock.
While field testing the second check valve of a double check valve assembly, water
continues to flow from the site tube, you open the bleed off valve and a small amount of
water comes out of the bleed off valve and then stops. The gauge reading goes to zero,
and water continues to flow from the site tube. How do you obtain the proper reading for
the second valve check? - Correct Answers -Record the observed reading before the
bleed off valve was opened.
While field testing the second check valve of an RP, the high side pressure is applied
through test cock number 4 and the gauge reading begins to increase. What does this
imply? - Correct Answers -Back pressure is present along with a leaking number 2 shut
off valve.
When testing and SVB, upon closing the number 1 shut off valve the gauge reading
starts to decrease. What does this imply? - Correct Answers -Number 2 shut off valve
leaks with demand.
