3-Piece Airlock

Closed fermentation protection — CO₂ out, oxygen in? nope. 🍺🫧

A classic, reliable airlock that helps maintain a closed fermentation environment by allowing CO₂ to escape while helping block outside air from getting in—reducing oxidation risk during active fermentation.

Why brewers love the 3-piece style ✅

• Easy to clean — fully disassembles for quick wash + sanitize

• See fermentation activity — watch bubbles to confirm things are rolling

• Handles vigorous ferments better than many S-lock styles (and easier to clean if krausen climbs)

• Blowoff-friendly — remove the top pieces and slip tubing onto the stem when needed

Fit & use

Works great with a #6.5 drilled stopper/cork, fitting everything from buckets to fermenters.

Tip: Drill your #6.5 cork/stopper to the appropriate size for your airlock stem (commonly around 3/8" for standard airlocks).