Question about Amtrol ST-5-C THERM-X-TROL ASME Expansion Tank, 2 Gallon

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My Amtrol Therm-x-trol tank has dropped 6 to 8 inches since it was installed, and a few drops of water are coming from the washer where is attached to the water heater. It is very heavy now. Could it be full of water and need to be drained. If so, how do I go about draining it.

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Sounds like the internal diaphragm has ruptured. The tank should be replaced immediately. You should disconnect the electrical power to the water heater and close off the incoming water supply to the heater. Open a HW faucet to relieve the pressure and remove the tank. Be careful cause you are going to get wet. Replace with a new tank.

Posted on Oct 01, 2010

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