OK to plug carboy when crash cooling? - Page 2 - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > General Techniques > OK to plug carboy when crash cooling?

Thread Tools
Old 02-21-2013, 07:50 PM   #11
ArrowheadAles's Avatar
Nov 2011
Manhattan, IL
Posts: 91
Liked 2 Times on 2 Posts

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.
They who drink beer will think beer.

-Washington Irving


Reply With Quote
Old 02-21-2013, 07:52 PM   #12
latium's Avatar
Jan 2013
Tempe, AZ
Posts: 110
Liked 20 Times on 19 Posts

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.

Reply With Quote
Old 02-21-2013, 11:37 PM   #13
Jun 2010
Glen Cove, NY
Posts: 393
Liked 15 Times on 15 Posts

@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.

Reply With Quote
Old 02-21-2013, 11:45 PM   #14
Jan 2013
Jacksonville, Florida
Posts: 49

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.

Reply With Quote
Old 02-21-2013, 11:51 PM   #15
Apr 2012
Acampo, CA
Posts: 62
Liked 8 Times on 4 Posts

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


Reply With Quote
Old 02-22-2013, 02:12 PM   #16
Misplaced_Canuck's Avatar
Jan 2011
NE Columbia SC - Formerly, Montreal Canada
Posts: 2,886
Liked 166 Times on 134 Posts

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).

Originally Posted by Misplaced_Canuck
Carbonic bite? Is that like the bubonic plague?
Originally Posted by ebstauffer
Needless to say after more than a few drams my mental efficiency matched my mashing efficiency.

Reply With Quote
Old 02-23-2013, 01:21 AM   #17
Jan 2008
Posts: 2,065
Liked 275 Times on 193 Posts

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...

Reply With Quote
Old 02-23-2013, 03:06 AM   #18
skipper1953's Avatar
Jan 2011
Monroe, WI
Posts: 123
Liked 12 Times on 6 Posts

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.
Rocket Socks Brewery

dzlater Likes This 
Reply With Quote
Old 02-24-2013, 01:16 PM   #19
pstrohs's Avatar
Jan 2010
St Louis
Posts: 295
Liked 12 Times on 12 Posts

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.
"Once in a while you get shown the light, in the strangest of places if you look at it right"

Keezer Build

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Carboy / plug issue. jfmaniac Beginners Beer Brewing Forum 11 07-11-2011 08:06 PM
Crash Cooling Help hopheaded Bottling/Kegging 3 03-01-2011 08:40 PM
Crash Cooling Micah Fermentation & Yeast 1 01-22-2010 02:32 PM
Best way to get Plug Hops out of a Carboy DMo General Techniques 5 04-22-2009 04:44 PM
Crash cooling nyer General Techniques 1 08-29-2008 05:02 PM

Forum Jump