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Wrap the top of the carboy and bung with some aluminum foil. This should add just enough pressure to hold it in place until it dries. Plastic wrap may do the same thing.


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Let the sanitized bung dry (preferably away from dust) before inserting. It fits more snuggly that way.


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It's also important to note: 5 gallon carboys usually use #7 bungs and 6 gallons use #6.5. The main risk here is that you'll sink the bung into the carboy if it's too small, but I imagine if it was too big you might have difficulty getting it to stay in. Also, I find it works best to fully insert the airlock in the bung, then insert the bung in the carboy, ...


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Have you tried Carboy Caps? http://www.northernbrewer.com/shop/3-5-6-gall-carboy-cap-orange.html I've had the same problem and switched to the caps and find they work Great


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Duct tape....I've done it more than once.


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Good 'ol fashioned weight works for me ;-) My bung for my blowoff hose kept popping out, so I just stuck this book on it. I know you're talking about an airlock, but just thought I'd share what my fermenter looks like right now. Also, are you doing blowoff at all? I usually do blowoff and then switch to an airlock after the fermentation dies down a bit. I'm ...


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The stopper does not need to be fully "inside" the neck of the carboy. It simply needs to rest naturally in the neck, and its own weight should hold it in place. Any CO2 should easily be relieved through the hole and through the airlock or blow-off tube; there should not be enough pressure to move the stopper at all.


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I have these bungs: Soft-ish rubber bung on the left, stiff plasticky rubber in the middle and soft silicone on the right. Silicone seems to be the least slippery when wet, but the soft rubber works OK. The one in the middle, OTOH will come out if you look at it funny. Your bung should require some effort to remove. If so, then make sure you don't some ...


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I recently received a big mouth bubbler for Christmas and when I went to clean it after fermentation the bubbler shattered in my hands. Luckily I didn't get to cut. I contacted Midwest supply they stated they were had a new manufacturer for the product and would send me out a new big mouth bubbler. I just received it I have not used it yet but it is ...


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Use a Better Bottle. Obviously not the huge open mouth of the Bubbler, but unbreakable, very safe, and sturdy. Just use some PBW and/or Starsan to easily clean.


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In addition to what others have said, thermal shock could have played a role as well. If the carboy was warm and your concrete floor significantly colder then the temperature shock could have shattered the glass. Your floor mats will now insulate the glass from the very cold floor.



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