Beer engine

A beer engine is a mechanical device used to pump beer from a cask to a tap, typically found in pubs and bars that serve real ale. It is designed to draw beer from a non-pressurized cask, allowing for the traditional serving of beer at a proper temperature and without the use of carbon dioxide or other gas pressures. The most common type of beer engine is a hand-pump, which requires the bartender to manually operate a lever to draw beer from the cask.