Used 12000 gallon 304 stainless pressure vessel. Manufactured by Whiting Metals Inc. Internal rated 2.5PSI/FV @ 150F. Dished top, cone bottom.Internal baffles, dual-flight agitator - Lightnin Right Angle Model 75C10 drive with 10 HP 3/60/230/460 volt motor. Mounted on (4) carbon steel Legs. 12' diameter X 12' high straight side. National Board# 1021. Serial #F-5695. Built 1991.