Used approximately 300 gallon stainless steel vertical storage tank. 45" diameter X 48" high straight side. Flat welded top and bottom. Top fittings: 1/3 hinged lid, (1) 1/2", (1) 1", (1) 1 1/2", and (1) 2" threaded inlets. (1) 2" center bottom drain and (1) 1 1/2" offset drain. 3" side top inlet.