Cleaning Keg with 4 Sankey D Couplers5 Gallon Cleaning Keg with Dual Sankey D Couplers Perfect for beer line cleaning! This cleaning keg is made of stainless steel and has a 19 liter (or just under 5 Gallon) capacity. The top of the keg features a removable lid with pressure relief valve and four Sanke D coupler connections. Hook up to four separate beer lines directly to keg, fill keg with a beer line cleaner, and then run the cleaner through the system according to the recommended