Used 36,500 gallon horizontal carbon steel pressure tank. Mfg by Flint Steel. Ser# SO1778-1,Built 1956. 12' OD x 42' 6" T/T. Internal rating: 220 PSI @ 180 deg. F. Mounted saddles. Heads - .9375"; Shell; 1". Stamped, Good condition. (Note: 1 nozzle needs repair)