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AMTROL THERM X TROL ST-12 Expansion Tank
Amtrol ST-12 (Therm-X-Trol) is a water heater expansion tank, designed for use in domestic hot water heating systems to eliminate the potential hazards of water expansion.Water ...
As low as $56.27 out of 3 sellers
User Review: This replaced the 1 year warranty T-12 expansion tank which only lasted on average of 3 years.