I just got my water pump replaced on my Peerless boiler. Now my backflow valve is always dripping. I am unsure if I should cap it off or if the dripping will stop over time. It seems that there is some pressure comming from the vent. What should I do??
The seal may be worn. Call back the company that installed the pump...
They are like any valve that may not have to operate in a while, sediment in the line gets caught in the seat of the back flow preventer when pressure has been lost to one side. The valve can be disassembled and cleaned but is not for the novice unless you have a lot of time. You can cap it for now but get it repaired or replaced because you will have little protection in keeping boiler water from your drinking water if the pressure is lost.
