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Home Brew Forums > Home Brewing Beer > General Techniques > OK to plug carboy when crash cooling?
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Old 02-21-2013, 06:50 PM   #11
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I crash cooled and forgot to switch out the blow off. Ended up with a half gallon of sanitizer on top of my beer. Not cool!

Now just a small amount of it in an airlock is the way to go.

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Old 02-21-2013, 06:52 PM   #12
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Lots of people on the web seem to be asking about how to get a stopper out of their carboy. And if it doesn't get sucked in, and carboy is glass, well, these aren't exactly pressure vessels.

Just sayin'. It's your equipment, and your choice. Just be sure to be informed.
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Old 02-21-2013, 10:37 PM   #13
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@Latium, I completely agree about the pressure aspect. The carboy imploding is my only real concern with using the stopper. I am just going to crash cool a carboy filled with water and measure exactly how much water (or in my case vodka) gets sucked back. if it is truly that minimal, I guess I will just stick to airlocks to be safe. But to be honest, suckback really bothers me and has kept me from crash cooling my beers for the 4.5 years that I have been brewing for so far.

ALSO, the only stories about the stoppers falling into the carboy did not involve the sort of stopper that I am using. The "universal" stopper I have WILL NOT get sucked/pushed in, no matter what force is being applied.

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Old 02-21-2013, 10:45 PM   #14
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I was cleaning my carboy by vigorously shaking it back and forth with soapy water inside, while using a perforated stopper as a top. It pushed in until below lip of carboy. Had to use a screwdriver to get it out - putting it through where the airlock goes. It didn't take much to get it in that far, and it almost went all the way in. There is no way of getting a stopper out of a carboy. Do what they say. Use an airlock. I had a mead sucking air back into the bottle, because I left the door open, and the temp went down. It would definitely pull a stopper in under right conditions.

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Old 02-21-2013, 10:51 PM   #15
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Why not plug one of the cheap sanitary air filters into the stopper. That would let the air pressure equalize and keep the incoming air clean. with enough headspace of CO2 the small amout of O2 shouldn't hurt. Just a thought

http://morebeer.com/view_product/167...anitary_Filter

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Old 02-22-2013, 01:12 PM   #16
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Quote:
Originally Posted by Bisco_Ben View Post
Has anyone ever actually had a rubber stopper suck into the carboy? I just refuse to believe that this is possible. I couldnt squeeze it through the neck of a carboy if I tried as hard as I could. Has this actually happened to someone or is this another homebrewing myth?
It's not a myth. When I brew in the winter in SC, I bring my sanitized carboys from inside the house to outside, while they are donning a non-perforated stopper. They usually get sucked in partially while the carboys are waiting to be filled. And this is from only 10-15 minutes outside, with a differential of about 20F (68F inside, 48-50F outside).

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Old 02-23-2013, 12:21 AM   #17
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I have cold crashed with a stopper. No problem. I read several threads where people did the same before attempting. I also tried a plastic bag with a rubber band to see how much it would suck in. Very little deflation. I think the pressure concerns are overstated. But watch my next stopper get sucked in...

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Old 02-23-2013, 02:06 AM   #18
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Get yourself a nice clean handkerchief. Fold it in half then half again. Lay it over the top of the carboy and secure it with a rubberband or a nice piece of string. The only thing that will likely get sucked into your carboy, other than filtered air through the handkerchief, will be lint from the handkerchief.
Problem solved.

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Old 02-24-2013, 12:16 PM   #19
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If I am cold crashing a beer I always use the s-type airlock and have never had suck back. I keep a couple around just for this reason. I don't use them for primary fermentation because they are a pain to clean if you get krausen in them.

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