How to Make a Keg Bung

People have brewed beer in casks all over the world for centuries. One of the quirkiest pieces of hardware on a cask is referred to as the bung and bunghole. The bunghole refers to the hole in the top of the cask. To prevent leakage, a bung or stopper is inserted with pressure to close the cask while it rests on its side. Today, bungs are made from plastic, rubber or wood.

Things You'll Need

• Rubber stopper, 1-inch top diameter 13/16-inch bottom diameter
• 1 tsp. vegetable oil
• Rubber mallet

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Instructions

1. • 1

     Purchase a #4 rubber stopper slightly larger than the bunghole it needs to fit from the local home brew shop. Purchase a tube of bunghole lube as well.

   • 2

     Lube the keg's bunghole using 1 tsp. vegetable oil.

   • 3

     Set the rubber bung's bottom over the bunghole.

   • 4

     Beat gently on the top of the rubber bung with the rubber mallet to secure it into the bunghole on the keg.