1/2" External NPT Heating Expansion Tank (2.0 Gallon), TK300-15

Honeywell Expansion Tanks absorb hot water expansion in closed heating systems. They are equipped with butyl diaphragms to separate the air from the system water. Pre-pressurized, the tank keeps fluids circulating and maintains minimum pressure. Features: Butyl/EPDM diaphragm- 9 times better than natural rubber Deep-drawn steel tank Controls system pressure Air-tight cushion-factory pre-charged to 12 psig and 100% tested Specifications: Hazmat Information: UN 1956 COMPRESSED GAS, N.O.S.,(air with up to 15% helium), 2.2 Volume (gal): 2.0 gal Maximum Acceptance Volume (gal): 1.0 gal Connection Size (in.): 1/2" Maximum Safe Operating Pressure (psi): 100 psi Diameter (in.) : 8" Height (in.): 12-5/8" Connection Type: Male NPT