ST-12 Therm-X-Trol Expansion Tank (4.4 Gal Volume)

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 Advantages:

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;

Amtrol ST-12 Specifications:

Factory pre-charged 40 psig;

System connection: 3/4" male threaded;

Stainless steel system connection;

Max. operating temperature: 200F;

Max. operating pressure: 150 psi;

Expansion tank volume: 4.4 gallons;

Max. acceptance factor: 0.73;

Height: 15";

Diameter: 11";

Shipping weight: 9 lbs;

Standards & Approvals:

NSF/ANSI 61®, IAPMO, SBCCI & City of Los Angeles listings.

Amtrol ST-12 Applications:

Residentail water heaters, laundromats, dormitories, office/apartment buildings, restaurants, etc.