4-in-1 Conical Fermenter Stainless Steel Jacketed Unitank Tank Only3 BBL and 7 BBL 4 in 1s are on clearance to make way for our new 5 in 1 fermenters. Limited quantities remain. Immersion heater heaters can be added separately. This commercial microbrewery stainless conical fermentor is almost identical to the 3 in 1 jacketed conical fermenter, with the only addition that it has thicker walls, and a domed lid with clamp fasteners to permit up to 14. 9psi of pressure inside the vessel. Once fermentation is completed,