Backflow valve leaking

Old 10-26-05, 08:21 AM
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Question Backflow valve leaking

I have a Peerless Oil-Fired Forced Hot Water Boiler.
The backflow valve on the cold water input to the radiant heat portion has a steady stream of water (~1-2 gallons/hour?) flowing out of it through the pipe that comes off of the valve (pressure release?) whenever the cold water valve feeding it is turned on. I currently have this valve closed.
Any help would be greatly appreciated.
Old 10-26-05, 08:02 PM
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Leaking BFP

On some backflow preventers you can take them apart & clean the seat. You could just have a piece of rust or, if it was used, teflon tape stuck under the valve seat.
Old 10-27-05, 03:17 PM
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I just replaced mine, my system is super old. +40 yrs. It took about 3 hours to disconnect the pipe and measure and solder in a new pipe and reducing valve. I just replaced it with like for like parts. Just make sure there is no pressure on any lines before doing work like that.

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