"D" system / American Sanke Coupler (Tap) with pull lever. The Pull lever style tap will last much longer than the twist style. This is the most common system available in the US. 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.