Amtrol® invented the thermal expansion tank to absorb expanded water in closed, hot water systems and protect the water heater. Since the beginning, we've kept the pressure on our competitors with features they just can't match; like our patented Turbulator™, antimicrobial liner, patent-pending InSight™ service indicator cap and 50 psig precharge. When your water heater is on the line, we deliver.

Amtrol® Therm-X-Trol® Thermal Expansion Tank, Vertical Free Standing, Series: ST Series, 10.3 gal Tank Volume, Acceptance Volume: 10.3 gal, 50 psig, ASME Yes/No: No, 15 in Dia, 19 in Height, Steel, 50 psig Pre-Pressure Rating, 200 deg F Maximum Temperature, FNPT, 3/4 in, Urethane Topcoat, Domestic

• Antimicrobial liner neutralizes bacteria on contact
• Patented Turbulator™ water circulation device
• InSight™ indicator cap tank service alert
• Strongest tank design featuring deep drawn steel and multi-dome construction
• Thickest diaphragm - heavy duty butyl
• Projection welded air stem to help eliminate leaks
• Exclusive ST-1 for tankless water heaters

• Instruction/Installation Manual https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/Amtrol_ST-5_Manual.pdf
• Specification Sheet https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/Amtrol_ST-5_Specification_Sheet.pdf