Full expansion tank
I have a old water heat system with radiators. The is a 2 1/2 story and the boiler and expansion tank are in the basement. I run the system operating pressure at 20 psi. This winter my expansion fills in a few days. I drained it a week ago and now its full again. Is this normal?
Note: I have turned the city water off to see if that helps but it hasn't.
X-Tank
How do you know it's full? Does it have a sight glass?
Designer
I knock on the tank add the sounds more solid than it did in previous years.
X-Tank
That doesn't mean that it's full. It should contain 2/3 water, 1/3 air.
If you run your heating system and the pressure stays stable, your x-tank has a proper air cushion.
IS this a long tank
hung in the floor joists? or a small tank hanging off the air separator?
Cost is what you spend , value is what you get.
