Unused Mueller Pressure Tank, 500 Gallon, Model "F", 304 Stainless steel, Vertical. 48" diameter x 72" straight side, dished top and bottom. Internal rated 30 psi at 350 deg F and -20 deg F at 30 psi. Insulated with foamglas and stainless steel sheathing. Openings: top (3) 1", 2'', (2) 3'', (2) top mounted lifting lugs; 3" center bottom outlet. Mounted on 4 stainless steel legs. Serial #357209-69, National Board #43281, built 2007.