Amtrol ST-5 (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 heater expansion tank is commonly installed in a domestic hot water system that contains a backflow preventer, a check valve or a pressure reducing valve.
Features
Eliminates the waste of energy and water, thus saving money
Protects the water heater and plumbing fixtures from premauture failure
Reduces potential safety hazards associated with thermal expansion
Prevents a dangerous pressure build-up in the system
Prevents the relief valve from going off
Therm-X-Trol brand is the #1 choice of Professional Installers