Better Bottle Dry-Trap Air Lock
The Better Bottle Dry-Trap Air Lock is a precision check valve made of an incredibly tough, proprietary PET that does not stain or impart flavors and is easily cleaned and sanitized. A polished glass/ceramic ball rests in a precision tapered seat to create a one-way seal. Fermentation gases can escape easily by pushing the ball up, but air is blocked from flowing in the reverse direction. A DryTrap has many advantages compared to liquid-filled air locks.