Amtrol® Thermal Expansion Tank, Vertical Free Standing, Series: ST Series, 44 gal Tank Volume, 33.9 gal Acceptance Volume, 50 psig, ASME Yes/No: No, 22 in Dia, 36 in Height, Steel, 50 psig Pre-Pressure Rating, 200 deg F Maximum Temperature, FNPT, 1-1/4 in, Urethane Topcoat, Domestic