| Thanks Guys Now I see what your talking about I do have a B&G Airtrol at the bottom of the tank. And didn't have any problems with system pressure or relief valves and haven't heard air going into the rads. So I'll just leave it the tank alone or drain completely, about 3 yrs. ago I did drain it completely and got about 9-10 gallons out of it so it must have had the air cushion at the top. Thank you very much for the advice!!! joe1575 |