7
Troubleshooting
PROBLEM CAUSE SOLUTION
Relief valve discharges water while system is not flowing Check No. 1 is fouled Remove and clean check No. 1
Relief valve does not properly close Service relief valve
Municipal water pressure is fluctuating Install check valve upstream of backflow assembly
Relief valve does not shut off properly Fouled relief valve seat Service relief valve
Incorrectly installed diaphragm Remove diaphragm and correctly install
Damaged rubber surface on piston Replace with new piston
Damaged or plugged pressure hose Repair or replace hose
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