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What pattern of relief-port discharge is worth a prompt call?
A brief discharge from a backflow preventer’s relief port seems different from water that keeps returning, but what timing actually helps tell the difference?
Does it matter whether it happens during water use, after a pressure change, or when no fixtures are running? I’d also like to know whether the discharge stops on its own and whether nearby fixtures show a pressure change. If the device label is readable, does knowing the type help interpret the pattern?
At what point would you shut off the supply and call a qualified backflow tester rather than wait and observe?
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1 reply
A brief discharge during use or just after a pressure change may be transient, particularly if it stops promptly. Repeated or continuing discharge - especially when no fixtures are running - deserves prompt attention from a qualified backflow tester. Timing is a clue, not a diagnosis; if the flow is substantial or persistent, don’t keep waiting to see whether it clears.
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