$5.50 $

Watch the visual passage of pressure through the airlock without air (oxygen) entering your fermentation vessel. The 3-piece airlock is large enough to handle gases created during ¬†fermentation of even the most active ferments, which the mini airlock cannot. The larger 3-piece airlock adds, roughly, 4″ (10.2 cm) to the height of each jar.


The barrel-style airlock contains an outer barrel and free-floating inner dome that sits overtop or the inner stem. The third piece is a perforated plastic lid to keep debris out of the barrel and minimize evaporation.

Insert the inner dome over the stem; fill airlock barrel with filtered water to the fill-line (1 1/2 tablespoons water). Snap the lid overtop of the barrel. Top up the airlock with water when the water level falls below the fill-line. Failing to do this will break the airlock, allowing air inside the ferment vessel. Appropriate for all jar sizes. Can be swapped out for the mini airlock after the room-temperature phase, before transitioning the ferment to cooler storage.

Allows a visual passage of gas pressure to escape but allows no air to enter.

Additional information

Weight 0.005 kg
Dimensions 14.5 × 11 × 0.5 cm

Component details

Grommet: FDA-NSF-61 food grade silicone, made in Canada


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