mdk0420
Well-Known Member
Hello all. I have a backflow preventer installed on my boiler system on the auto feed line for my boiler. Right before the backflow is the shutoff valve. Right after is the auto feed regulator as a backup to the systems auto feed regulator. There is a check valve in the boiler to prevent backflow of water as well as a check valve on the auto feeder I have, and a pressure gauge reading 12 PSI. The water coming in is right around 60 PSI.
My first backflow preventer was really leaking, almost a constant flow. I got it replaced but the new one is now only occasionally leaking. It does about 2-4 drips every couple of seconds. At first I thought that it would be caused by a fluctuation in the pressure. I tested this by turning on and off a faucet I have installed on the water lines coming off the boiler. When I turn them off and on I can hear almost a pop sound coming from the end of the vent line. I figure that sound is from the check valves clamping down to prevent the water from entering the water main. However I don't understand why I am getting inconsistent water drips. The drips even happen for a while when I turn the shutoff valve off. The boiler is off so the auto feed is also shut. I figure that would eliminate any "Fluctuation" problems because now the backflow preventer is holding 60 PSI constant in that line. I installed it right out of the box.
I thought maybe installing a check valve somewhere before the backflow preventer might help keep fluctuations from causing issues but that doesn't seem to be the problem. What should I look for?
My first backflow preventer was really leaking, almost a constant flow. I got it replaced but the new one is now only occasionally leaking. It does about 2-4 drips every couple of seconds. At first I thought that it would be caused by a fluctuation in the pressure. I tested this by turning on and off a faucet I have installed on the water lines coming off the boiler. When I turn them off and on I can hear almost a pop sound coming from the end of the vent line. I figure that sound is from the check valves clamping down to prevent the water from entering the water main. However I don't understand why I am getting inconsistent water drips. The drips even happen for a while when I turn the shutoff valve off. The boiler is off so the auto feed is also shut. I figure that would eliminate any "Fluctuation" problems because now the backflow preventer is holding 60 PSI constant in that line. I installed it right out of the box.
I thought maybe installing a check valve somewhere before the backflow preventer might help keep fluctuations from causing issues but that doesn't seem to be the problem. What should I look for?