- Aug 26, 2020
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When can you or safe to replace the air lock with a solid bung in carboys? After fermentation, during aging?
I had some issues with even the drilled universal bungs (Image below) not wanting to stay in. I cured the problem for me by soaking them in some HOT water and then pressing them into a cool carboy and holding them there for a minute or two. I found that then they will permanently reshape and fit with no popping up issues. I also make a habit of pushing the bung in first THEN fitting the airlock. Seems (?) to help lock the bung in that way. (Like a wedge)I have some vented bungs coming for my barrels to use when I first put wine in my barrels. I'm doing this because the shelf is too low for an air lock. However after a month or so A solid bung works exactly as NorCal described. In carboys I find that certain solid bungs won't stay no matter how old the wine is.
I use the same ones from MoreWine, work like a charm, never had an issue.
A little trick to help your silicone stopper stay in place is to push it all of the way down into the carboy neck, up to the flange on the stopper. While holding the flange, allow the stopper to "burp" out the air pressure that you've created when shoving it in. That always holds mine in place, and they are even more firmly in place as the wine between the stopper and the glass dries.I use the ones that you show too. They are generally fantastic. Just be aware that not all carboy mouths are the same, and some have a tendency to push the silicone stopper up and out, especially when the stopper is wet. I don't know why but it's a consistent clear thing. I have 2 6 gallon unmarked carboys (I assume they are from China but I don't know) that I never use silicone stoppers on,, because invariably the stopper will not stay in place. Anyway, because they are slippery, always check the first few days to make sure they have stayed in place.