Used 4000 Gallon Stainless Steel Vertical Vacuum Rated Pressure Vessel. Manufactured by DCI, Inc. Rated 30/FV @ 300F. 8' Dia. x 11' Straight Side Height (15' Overall Height). Dish Top and Dish Bottom. 3" Center Bottom Outlet. Sanitary construction. Insulated. Serial #87PH35575. National Board #950. Built 1987.