|Posted by hj on March 08, 2004 at 08:54:42:|
|In response to Re: recirculating pump for a boiler|
If the pump is on the return line to the boiler it can affect the pressure somewhat, but usually not to that extent because in a closed system the water pressure going out of the pump is balanced by the suction of the water coming into it. What is the pressure when the pump is off?
: Does the speed have anything to do with the pressure in a boiler system. I had someone come in and put a new recirculating pump in for my boiler but the pressure used to be only about 12 psi in the system now it wants to go above 30 psi and that is what the safety blow off valve is set at. The new pump speed is almost twice what the old one was.