“These pumps are delicate inside and break easy especially if the water in the system gets low .Pricy to replace but if you search on plumbingsupplyandmore there's nothing you can't find and at a reasonable price . This replacement pump works great and half the price of picking on up locally .”
“Once you know what you are doing, very easy installation. Just 4 bolts. The problem is installation information is extremely hard to come by. So after watching hours of videos, thought I'd share my tips for what should be a 15-minute install. 1) need figure out if the circulating pump you are replacing is on the RETURN side, or the FEED / SUPPLY side. This should be easier to know then it is for a novice like me. An hour of research revealed my RETURN side pipes came back into the lower half of my oil-fired boiler. My SUPPLY side had an air vent and expansion tank connected to the pipe run and exited to top half of the boiler. 2) with that finally determined I realized my pump was on the SUPPLY side. It can be either, and SUPPLY side is non-standard. But apparently fine. Knowing that, I had to make sure the Flow Arrow on the pump (I have the internal check valve version) faced toward the flow of the water which in my case was up and away from the boiler given it is a SUPPLY pipe. 3) to get the electrical on the correct side for my install, I had to remove the 4 pump bolts with an allen wrench, and pivot the entire pump and install back onto the base. No big deal, but worth knowing this if you need do the same. The electrical was easy. 2 wire nuts. White to white and in my case, Black to yellow. 4) This may be unique to my situation but the reason I was replacing the pump was a loud humming noise from that particular old circulator. I was shocked to hear the same noise there when I was done with my install. Another hour of research found a helpful video suggesting I purge air and water from that zone. Simply opened the Return line water valve and dumped it into a 5 gallon bucket. Apparently that got the air out. My autofill slowly replaced my depleted water, ie, in my case I didn't have to do anything in terms of refilling my boiler. So all is working great now. Nice and quite and pipe is hot on both sides of the pump meaning I got the trapped air out. Hopefully this saves you some research time.”
