Used 15000 Gallon Horizontal stainless steel tank (Carbon Absorption Unit) 9' Diameter X 31' long straight side. Dished Ends. Tank fully insulated and covered with aluminum sheathing. Mounted on saddles. Interior is baffled lengthwise with bottom side grated with ceramic spacers sitting on grate. Above spacers is a stainless steel screen to support the carbon bed. One end of tank has 30" pneumatic butterfly valve with internal bladder seal. Opposite end has 24" bolt on manway. Top Fittings (3) 3", (1) 24" manway, (1) 30" pneumatic butterfly valve with internal bladder seal.