A cleaning socket for a keg coupler is a wall-mounted device that is used to clean keg systems. It is designed to fit specific types of keg couplers. A cleaning socket helps to maintain the quality and taste of the beer. Over time, build-up and residue can accumulate in the keg system, which can affect the flavour of the beer. By regularly cleaning the system using a cleaning socket and a cleaning solution, you can remove this build-up in your beer dispensing system and ensure that the beer being served is fresh and tastes as intended.