Pfaudler Company Insulated Single Shell Tank- 500 Gallon. Order No: 33286. Inside straight-wall dimensions: 5 ft. 6 in. dia. x 3 ft. 3-1/2 in. H. Equipped with (2) flip-top lids and a center bridge. Inlets: (1) 1-1/2 in. dia. port, (1) 1 in. dia. port, (1) 1 in. dia. coil infeed port, (2) 3/4 in. dia. ports, (2) 1 in. dia. thermocouple ports. Outlets: (1) 2 in. dia. S-line drain port, (1) 1 in. dia. coil drain port. Overall dimensions: 6 ft. 2 in. L x 6 ft. 1 in. W x 6 ft. 2 in. H.