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Old 08-02-2012, 03:04 PM   #1
demagxc
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Default Goodbye to Suck Back

While cold crashing a batch a few months ago I was having a lot of trouble with suck back. I know its not a big deal since I use a Star San solution in my airlocks, but its still annoying and unsettling for some reason. So I brewed my first lager this past weekend and have run into a bit of post brew boredom. Boredom usually ends in weird projects and in this case I decided to eliminate this suck back problem for good. This is what I came up with:

2012-07-30_19-35-52_735.jpg

I had a few things on hand so I think it cost me about $10. I tested it when topping off the airlock by pouring some of the Star San solution directly into the the tube in the middle and not a single drop landed in the carboy. It all made its way into the tubing on the side. Although not a necessary addition I think its pretty cool.

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Old 08-02-2012, 03:12 PM   #2
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If it really bothers you, try the silicone airlocks. http://www.rebelbrewer.com/shoppingc...s-Airlock.html

Edit: they don't fit better bottles though

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Old 08-02-2012, 03:29 PM   #3
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A loop of tubing will make a simple airlock that will work the same as the S tyle airlock and prevent suckback.

http://youtu.be/w17QISJt-kg

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Old 08-02-2012, 08:20 PM   #4
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S type airlocks are about $1 around here, and do the same thing.

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Old 08-02-2012, 08:28 PM   #5
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Quote:
Originally Posted by pdxal View Post
S type airlocks are about $1 around here, and do the same thing.
Actually they're better than his setup. His has the potential for running dry.
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Old 08-02-2012, 09:05 PM   #6
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Conceptually, the best solution is to have a mylar balloon attached to that tee. When active fermenting, it will inflate it with CO2, then when full it will outgas through the airlock. When you drop the temp to lager or cold crash, the vacuum created in the carboy will just pull in the CO2 and deflate the mylar bag. The last thing you want is fridge air being drawn in.

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Old 08-02-2012, 09:19 PM   #7
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Very cool idea. I am a fan of the type S airlocks myself. Cheep and easy.

M

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Old 08-02-2012, 10:45 PM   #8
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Quote:
Originally Posted by peter78
If it really bothers you, try the silicone airlocks. http://www.rebelbrewer.com/shoppingc...s-Airlock.html

Edit: they don't fit better bottles though
I work in a homebrew store and we carry the vented silicone stoppers that fit better bottles. It's a size #10
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Old 08-02-2012, 10:58 PM   #9
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A piece of aluminum foil works too.

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Old 08-02-2012, 11:44 PM   #10
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Quote:
Originally Posted by Bobby_M View Post
Conceptually, the best solution is to have a mylar balloon attached to that tee. When active fermenting, it will inflate it with CO2, then when full it will outgas through the airlock. When you drop the temp to lager or cold crash, the vacuum created in the carboy will just pull in the CO2 and deflate the mylar bag. The last thing you want is fridge air being drawn in.
Very interesting. Got a picture of that setup? I think i follow you but just to be safe...
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