The Surprising Origin Of Beer Taps
The beer tap started as a simple wooden plug. While we use taps today to pour drinks, the name literally refers to the primitive conical sticks once used to seal barrels.
Before modern valves existed, brewers used carved wooden plugs to stop leaks in their casks. People would tap these plugs with a mallet to loosen them and allow the liquid to flow. Over time, the device and the action became permanently linked in our language. It is fascinating how a basic piece of wood evolved into the complex mechanical faucets seen in every pub today.
Source: Beer tap