D System - Keg Coupler - Tap w/ Ergo Lever Handle "D" system is the most common system available in the US, also known as American Sankey. It is used by all the major breweries - Anheuser-Busch, Miller, Molson-Coors, and Labatt as well as most craft breweries. Visit our beer system listing for an expanded listing of beers that use the "D" system valve. Do all brands of beers use the same keg tapping equipment? The keg coupler connects to the keg valve, "tapping" the keg. Both the gas hose from the CO2 tank / regulator and the beer hose to the beer faucet attach to the coupler. Beer Keg Coupler Features: Stainless steel body improves durability and resistance to chemicals Stainless Steel probe for the ultimate in purity Excellent for beer, wine, and cider Short handle is ideal for smaller diameter kegs Easy to engage handle: push down to tap/pull up to untap Specifications: System"D" (American Sankey) Body Material303 Stainless steel Probe Material304 Stainless steel Handle ColorBlack Handle StyleErgonomic Lever Gas Port3/8" O.D. Barb (To fit 5/16" I.D. Gas Hose) Beer Port7/8"-14 Thread (U.S. Beer Industry Standard)