D System - Draft Beer Keg Coupler - Tap with Red 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 line 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 handle fork for added strength Tin-nickel plated probe is resistant chemicals and won’t chip like chrome Short handle is ideal for smaller diameter kegs Specifications: System"D" (American Sankey) Body Material303 Stainless Steel Probe MaterialTin-Nickel Alloy Plated Handle ColorRed Handle StyleLever Gas Port3/8" O.D. Barb (To fit 5/16" I.D. Gas Hose) Beer Port7/8"-14 Thread (U.S. Beer Industry Standard)