Amtrol® Therm-X-Trol® Thermal Expansion Tank, Diaphragm Free Standing, Series: ST-C, 14 gal Tank Volume, Acceptance Volume: 9 gal, 175 psig, ASME Yes/No: Yes, 16 in Dia, 19 in Height, Steel, 55 psig Pre-Pressure Rating, 200 deg F Maximum Temperature, FNPT, 3/4 in, Red Oxide Primer, Domestic