Fill with water and insert in drilled stopper or bung to vent gases during fermentation. 'Bubbler' style airlock makes a gratifying 'bloop' noise during active fermentation. It is the preferred airlock for secondary fermentation, as it is possible to monitor the pressure inside the fermenter.

An airlock is a small device, that when filled partially with water, acts as a water trap. It attaches to the top of a fermentation vessel and allows the gases caused by a fermentation to percolate through it and out of the vessel without allowing contaminants to get to the must. For additional information regarding the product, please contact with DuBuy support team.