Cold crash trouble. - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > General Beer Discussion > Cold crash trouble.

Thread Tools
Old 11-15-2012, 01:30 AM   #1
Feb 2012
Posts: 125
Liked 5 Times on 4 Posts

Anybody ever have problems with a 3 piece airlock. When Cold crashing ? My water level dropped down into the area below the holes in cap. Worried me that wasn't good. Added more star -San water three times total.

Reply With Quote
Old 11-15-2012, 01:37 AM   #2
Jan 2012
Posts: 25

I use vodka just for that purpose. If it gets sucked back in, oh well. When the liquid in your carboy cools, it basically shrinks creating a vacuum which sucks your star san back into your carboy. No problem with your air lock, just the laws of nature. A one piece may not suck back as much as a three piece.

Reply With Quote
Old 11-15-2012, 06:07 AM   #3
daksin's Avatar
Aug 2011
San Diego, CA
Posts: 4,617
Liked 357 Times on 311 Posts

Yea, 3 piece airlocks will cause suckback when you apply negative pressure (cold crash- the air inside the carboy contracts as it cools). 3piece airlocks or just using an aluminum foil cap will prevent that issue, but it will continue to be a problem as long as you use 3piece airlocks. Use vodka or sanitizer in your airlock if you're concerned and don't want to buy new airlocks.
I can't be arsed to keep up this list of what's in the fermenters, but hey, check out the cool brewery I own! .. ..

Reply With Quote
Old 11-15-2012, 12:05 PM   #4
KarlHungus76's Avatar
Aug 2011
Chicago, IL
Posts: 164
Liked 7 Times on 6 Posts

(S-type) air locks will solve this. +1 on vodka.
"I'd rather have a bottle in front of me, than a frontal lobotomy"
-Tom Waits

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
cold crash columbian Cider Forum 8 10-24-2012 07:57 PM
Cold Crash or just keg?? Dgonza9 Fermentation & Yeast 3 07-19-2011 02:47 AM
To cold crash or not to cold crash?? showdown496 Beginners Beer Brewing Forum 4 11-23-2010 06:02 PM
Must brew be *kept* cold after cold crash? sensibull Beginners Beer Brewing Forum 9 11-05-2010 07:18 PM
Cold Crash Mateo General Beer Discussion 8 04-20-2010 01:31 PM

Forum Jump