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Most fermenting vessels require a stopper to hold an airlock in place or seal it up while moving so what is the technical name of that stopper?

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    Bung. The hole is called the bung hole and now you know where that term came from! Nov 24, 2018 at 15:08

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The stopper is called a “bung”. The hole is called the bung hole.

A bung, stopper or cork is a truncated cylindrical or conical closure to seal a container, such as a bottle, tube or barrel. Unlike a lid, which encloses a container from the outside without displacing the inner volume, a bung is partially inserted inside the container to act as a seal. - Bung (Wikipedia)

Bung

Bung in the bunghole of a wine barrel

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  • Thank you @Eric Shain Nov 24, 2018 at 14:34
  • @kengraham Thanks for the edits!
    – Eric S
    Nov 24, 2018 at 18:16

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