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hot water heating system expansion tank (no bladder)
I replaced the body gasket between the Bell & Gossett bearing assembly and the pump body last night . . . afterward, I put everything back together and started to pressurize the system. With the boiler off and cool, I drained the expansion tank a little and refilled it to where the Airtrol fitting began to spit. I turned the little nut on the fitting to stop the flow of water from the tank . . . but I think the tank kept filling with water. I did the drain/fill/spit thing a few more times with the same results.
It's been five years since I last replaced that gasket and I don't remember what to do to re-pressurize the system.
Any help is appreciated.