Used 500 Gal Vertical 304-SS Pressure Tank, rated 100 PSI @ 200 deg F. 5' Diameter x 3' Straight Side. Dish top, Cone Bottom. .316" head thickness, .375" wall thickness. Top Nozzles: (3)2", 6", 12", 12"x16" manway, Bottom: 6" outlet. Mounted on 3 legs. Mfg by Arrow Tank Company 1988. S/N: 16812, NB# 15741.