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 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. AMTROL ST-12 Applications: Residential water heaters, Laundromats, dormitories, office/apartment buildings, restaurants, etc.

• Provides efficient water and energy usage
• Prevents premature failure in plumbing fixtures and water heaters
• Eliminates hazardous pressure build-up in the system