Seal your fermenter securely with the Craft a Brew #6.5 Carboy Rubber Stopper, a durable brewing bung designed for 1 gallon fermenters, airlocks, and blow-off tubing setups. This food-safe rubber stopper creates a tight seal during fermentation while supporting proper CO2 release through compatible airlocks or transfer tubing. Designed to
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Fermenting pail stopper
Fits into the hole in the lid quiet nicely, however it could be a bit more snug.
M
Mother · October 20, 2026
Good Stopper!
Great item. The only problem is that the transfer tubing, which I use for the furst few days of fermentation, doesn't really fit in the hole and I must distort and stuff it in. It would be nice if they matched.
P
Peter · May 14, 2024
Its a stopper. Pretty much it. Fits the 1 gallon glass carboys really well.