What is the probable cause of a relife valve failing to open during a - ProProfs Discuss
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What is the probable cause of a relife valve failing to open during a field test on a reduced pressure principle backflow preventer?



A. A leaking #1 shut-off valve
B. Low water supply pressure
C. Air trapped inside the relife valve
D. Excessive backpressure
E. A malfunction of the relife valve mechanism

This question is part of Backflow qiz 3
Asked by Pbarton, Last updated: Jan 07, 2020

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pbarton

Pbarton

Answered Jan 10, 2018

A malfunction of the relief valve...Read More
 

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