Amtrol® Therm-X-Trol® Thermal Expansion Tank, Vertical Free Standing, Series: ST Series, 20 gal Tank Volume, 11.4 gal Acceptance Volume, 150 psig, ASME Yes/No: No, 15 in Dia, 32 in Height, Drawn Steel, 50 psig Pre-Pressure Rating, 200 deg F Maximum Temperature, FNPT, 3/4 in, Urethane Topcoat, Domestic