Click on This thumb nail to see a larger picture of this Weil McLain
Boiler that I made repairs to.
Oh Great even with the fill valve removed and the handle for the boiler drain
gone the tank will still not fit between the pipes. I can not remove this tank,
And I can't get the new one back there either.
So I stand the old tank up and push it back out of the way. (it will stay there till the boiler or the water heater heater is replaced) now with some 1/2" black nipples and fittings I run the pipes in a different direction, facing the front of the boiler
I install the new filtrol fill valve (this comes with the new Tank) by the way this is a 110 filtrol If you need to buy this, It looks like the # 30 expansion tank, But it is different and they are not interchangeable. Then I tie the copper line into the new fill valve.
Then I screw the new tank on to the fill valve. Now if it has to be replaced in the future, it's right there in the open, like it should have been in the first place. Now I put in the new auto vent. and turn the water back on.
But I do not turn the power back on yet because the system is full of air and needs to be purged.
This is a picture of the return side of the boiler. I have opened all the zone valves manually and turned all of the red valves off. I hooked the hose to each of them one at a time and opened the boiler drain about half way (you don't want to let it run out faster then it goes in)
What I like to do is put the other end of the hose into some kind of clear bucket so I can see the air coming out of the lines and I let the water continue to run till I don't see allot of air bubbles coming up from the bottom of the bucket. After this has been done to all the zones. Put the hose on the highest boiler drain or the one furthest from the pump. start letting the water run from the boiler drain then open the red valve ( yours may not be red) and then close the zone valves and let that run till there is no more air. Now you can open all the valves and turn the power to the boiler back on. Find a local Plumbing and Heating contractor
Website by: Thomas Petito Reardon