Our Basic Uni-Fermenter is constructed out of a brand new 15.5 Gallon Stainless steel keg. These work great for fermenting, conditioning,carbonating and serving. They also make great yeast propagation brinks for large breweries.The unit pictured has the optional legs, bottom valve and elbow additions. With out the optional legs installed they are 24" tall allowing them to fit in to most freezers and fridges with ease. With optional legs installed they are 32" tall. All fittings are professionally TIG welded and re finished. The Uni-Fermenter features a 4" Sanitary tri clamp fitting on the top of the keg, to access the interior of the keg. The removable 4" tri clamp plate contains both liquid and Co2 cornelius soda keg disconnects, as well as a safety pressure relief valve. The soda keg liquid out fitting has a dip tube that is a 1/2" off of the bottom of the fermenter and can be used to rack out the beer under Co2 pressure for kegging, as well as for serving. During fermentation, Co2 blow off is accomplished by removing the Co2 connecter body fitting, and removing the poppet seal from the connector body. Next the connector body is sanitized,and re-installed without the poppet valve. Then a supplied FDA silicone 5/8" hose is attached to the female fitting, and run down into a bucket of water to serve as an airlock and to catch any beer blow off. Once fermentation has stopped the blow off tube is removed, along with the Co2 connector body fitting. The poppet valve and connector body are then sanitized, and re-installed prior to pressurizing with Co2 for conditioning, serving or racking.The additional option for the 1.5" Sanitary port & bottom valve features a 1.5" TC clamp fitting connected to a sanitary stainless ball valve for easy cleaning. The additional leg and caster option features 3 welded Stainless Steel legs, with swiveling, lockable casters, that can quickly be removed by unthreading the wheel from its leg that contains a welded in, threaded insert. This allows you to shorten the overall height of the unit by 3" The additional elbow option is for a 90 Degree elbow that attaches to the bottom 1.5" port so that the valve is orientated horizontally instead of vertically. The Thermowell addition features a 1/2" tube welded into the 4" top cap which protrudes 10" into the fermenter and is sealed on the immersed end. This allows a manual or digital temp probe to be inserted into the thermowell for even more accurate temp readings. Please feel free to Email us with any questions you may have and we will gladly answer ASAP.