This S-bubble airlock is the preferred choice for secondary fermenters, as it allows you to monitor the pressure in the fermenter.
Fill to line with boiled water or sanitizer to create a closed system, which allows CO2 to escape, but doesn't allow air back in to contaminate your wine or beer.
Customer ReviewsWrite a review
Works like it should
Does the job better than others.
I have both S bubble type and the others. These S Bubble type are the best
Keeps the air out and lets you know when fermentation is complete.