Posted by jtown on November 12, 2001 at 14:47:08:
In Reply to: Expansion tank leak. Help. posted by Jennifer on November 12, 2001 at 14:33:52:
First. DO NOT LET FULL CITY (WELL) PRESSURE INTO THE SYSTEM. Add some water and then go vent or have a helper let in a little more water when the pressure drops. Your safety valve in the basement should have handled it. Maybe you have a safety on the expansion too. Upstairs exp tanks were used for gravity systems (no pump) with large pipes going to both sides of the radiator. Yours may have been converted and the tank sealed for pressurized use. Originally it would have had an overflow pipe that dumped extra water out through the wall of the house. If you ruptered the tank you will need a new one. You may have blown out a sight glass or other fitting, or popped a safety that will reseat itself. If you need a new tank, get a modern bladder type and mount it in the basement. At a heating supply house it might be $50 or more. If you have anyone that can mount it. If you are a converted gravity you will need a larger one for the expanssion of more water when it gets hot.