Cold crashing blow off tube question...

Discussion in 'Homebrewing' started by cristyroad, Oct 5, 2015.

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  1. cristyroad

    cristyroad Initiate (0) Oct 2, 2015 Indiana

    Thinking of cold crashing a batch in a few days. My concern is the airlock being sucked in from the temp change. Could I just put a tube in my bung and put a cotton ball in the end of it instead of having a airlock? Also, I would assume the cotton itself would be enough, but should I soak it in alcohol before?
     
    #1 cristyroad, Oct 5, 2015
  2. invertalon

    invertalon Pooh-Bah (2,249) Jan 27, 2009 Ohio
    Pooh-Bah Trader

    Use a S-type airlock and no sanitizer will end up in the beer.
     
    #2 invertalon, Oct 5, 2015
  3. cristyroad

    cristyroad Initiate (0) Oct 2, 2015 Indiana

    I've heard this before. I guess I just don't understand the mechanics behind it. Is it just the way an S airlock is shaped in terms of gravity that won't suck any liquid in?
     
    #3 cristyroad, Oct 5, 2015
  4. minderbender

    minderbender Initiate (0) Jan 18, 2009 New York

    The idea is that as air comes in, it bubbles up through the liquid rather than pushing the liquid up the tube and into your beer. Have you ever seen someone use a bong?
     
    #4 minderbender, Oct 5, 2015
    cristyroad likes this.
  5. cristyroad

    cristyroad Initiate (0) Oct 2, 2015 Indiana

    Yes I've "seen" this sort of activity before. That makes sense. Thanks
     
    #5 cristyroad, Oct 5, 2015
    minderbender likes this.
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