Fill the Bubbler Airlock 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, and it is often the go to winemaking airlock.
To use: Insert assembled airlock into the hole of the rubber stopper that fits your current jug or carboy. The airlock cap should always stay on top when in use; it allows gas to escape but prevents the water inside from quickly spilling out if tipped or jostled.