WATTS Backflow Preventer leaking


Old 03-01-13, 09:58 AM
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WATTS Backflow Preventer leaking


I should start off by saying I'm a very amateur DIY'er, but not afraid to roll up my sleeves and attempt DIY jobs.

I have a Weil Mclain wtgo-4, oil fired boiler, with a 1/2 9D-M3 WATTS backflow preventer installed. A few months ago, I noticed a few gallons of water on the floor under the discharge pipe connected to the backflow preventer. I have since placed a 5 gallon bucket under the pipe and am emptying the bucket once every couple of weeks (about 3-4 gallons a trip).

Should I replace the backflow preventer, which I've found at Home Depot for about $45, or is this a sign of a bigger issue and the backflow preventer is performing as intended?

Thank you
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Old 03-01-13, 10:16 AM
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It's probably just the backflow preventer leaking... it's very easy to change out... you have valves on both sides to facilitate.

See also this thread, scroll down to the diagrams I posted of how they work for more reassurance that the problem is with the valve and not the system.

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