Used approximately 50 gallon vertical stainless steel jacketed tank. Internal 15 psi/Full vacuum @ 250 degrees F. Jacket 125 psi @ 250 degrees. F. Built 1984. NB 3385 SN: 9310-B. Model 50 UDB. Built by Lee. Grundos pump 2 HP 3 phase 60 cycle 208 230-460 volt - 11 gpm @ 272' head.