What is a draft beer keg tap?
A draft beer keg tap and a keg coupler are the same thing. It connects the pressurized CO2 gas (or air if you are hand pumping) and the beer delivery line to the keg. In the U.S. the normal coupler is the Sankey “D” lever keg tap coupler and this opens and closes the valve in the beer keg allowing the gas in and the beer out.