#cask_breather
Cask breather
Aspirator used in serving draught beer
A cask breather is a type of demand valve used to serve draught beer. The cask breather enables the empty space created when beer is drawn from a beer cask to be filled with carbon dioxide from an external source. This prevents ambient air from being drawn into the cask, thus extending the life of the beer by preventing oxidation.
Sat 23rd
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