Resideo 1/2" External NPT Heating Expansion Tank (7.6 Gallon)

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: Volume (gal): 7.6 gal Maximum Acceptance Volume (gal): 2.5 gal Diameter (in.) : 11" Height (in.): 23" Connection Type: Male NPT