A fermentation lock, colloquially air lock or just lock, is a device used in the production of fermented beverages, especially beer brewing and wine making. Locks work when filled halfway with water, allowing carbon dioxide released during fermentation to escape the brewing vessel while not allowing air to enter it, thus avoiding oxidation.
A fermentation lock, colloquially air lock or just lock, is a device used in the production of fermented beverages, especially beer brewing and wine making. Locks work when filled halfway with water, allowing carbon dioxide released during fermentation to escape the brewing vessel while not allowing air to enter it, thus avoiding oxidation.
Source: Wikipedia "Fermentation lock" · CC BY-SA 4.0
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