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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Blowout tube diameter?
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Old 01-23-2013, 01:04 AM   #1
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Default Blowout tube diameter?

So my first batch I brewed I thought a fermenter/airlock would work. Boy was I wrong! I had foam shooting out the small holes on top of the airlock. I then switched to a 1/4" clear hose (that's all I had) and stuck it in the carboy stopper in place of the airlock, and put the other end in a bucket with sanitized water.

So my question is, for future batches, will this small of a tube work? Or should I get the big ones is see in pictures on this site? If I do need to get a large one, I have a 5 gallon glass carboy...what diameter do I need to purchase and how long would you recommend?


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Old 01-23-2013, 01:07 AM   #2
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I use the same stuff as the racking tubing. Works fine. After four days or so on a big beer you can put the airlock back on. If it get clogged or full of krausen, pull it, rinse it, sanitize and reinstall.

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Old 01-23-2013, 01:09 AM   #3
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You can't go wrong with a 1" blow off tube into a starsan bucket. Even high gravity beers won't blow the air lock. The blow off tube fits in a carboy.

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