The quickest and easiest way to drain the liquid from a keg is by twisting off its lid and pouring out its contents. The method is less time-consuming than pumping out the liquid by hand. It also can ready any keg promptly for cleaning, recycling, re-purposing or other uses.
Release leftover pressure in the keg by switching on its pressure-relief valve, which is a round key on the keg's lid.
Push the keg's lid down while turning the lid 90 degrees. Lift the lid, and remove it from the keg.
Pour out liquid from within the keg.