4" Party Pump - Chrome w/ 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? What is the difference between a party pump and keg coupler? Party Pump Features: Forged brass body 4" chrome plated metal pump Lever handle for easy keg tapping Specifications: SystemD TypeGold Plated Base PumpHP-700 FaucetPlastic with squeeze trigger Note: After each use, be sure to clean your party pump with chemicals specifically manufactured for beer line cleaning. The simple process takes only a few minutes and will assure trouble free operation when the party pump will next be used. See our Party Pump operating and cleaning instructions.