A keg adapter to alleviate keg valve coupler system incompatibility. The keg adapter has a first end and a second end, the first end being compatible with at least one tap head coupler and having a diameter greater than the second end and the second and being compatible with at least one keg valve system. The keg adapter may be compatible with any combination of tap head coupler and keg valve system. A method of installing the keg adapter onto a keg for dispensing beer is disclosed. Also a method of using a keg adapter to dispense beer from a keg.