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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Blow Off Valve Size
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Old 07-17-2009, 06:16 PM   #1
json2001
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Default Blow Off Tube Size

I'm looking to make a Imperial Stout next week. I have a 6.5 gallon glass carboy.

Do I need to use a stopper? Or can I get some 1'' tubing and shove that in? What's best practice here, never used a blowoff.

Here is my carboy...pretty standard, but maybe the picture helps?



Thanks in advance.



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Old 07-17-2009, 06:19 PM   #2
chode720
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If I need a blowoff, i just put some 1/4 in tubing that I have into the hold on top of my plastic fermenter. It fits in there perfect and all the blowff easily makes its way out.

I havent done it with a carboy, but you can probably buy one of those carboy caps that has the 2 openings. Put the airlock in to start, and if it krausens high, you can easily affix a blow off tube.

My $.02


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Old 07-17-2009, 06:22 PM   #3
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I use 1" ID vinyl tubing from HD. It fits perfectly.
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Old 07-17-2009, 08:22 PM   #4
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I was using the 1" tubing, but it's large and bulky and a bit of a pain to clean/store.
I found a PEX fitting that fit onto my carboy stopper, and I use standard 3/8" tubing just for blow offs (it gets cleaned, but remains stained, so I don't use it for anything else). So instead of the stiff 1", it's more flexible and easier to coil into a growler, etc



the stopper and the PEX

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Old 07-17-2009, 08:30 PM   #5
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Hmm interesting options. Thanks guys!
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Old 07-17-2009, 10:09 PM   #6
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Just for what it's worth, I have two 4' pieces of 1 1/4" OD vinyl clear tubing (got it at Lowes) that I use for blow off tubes. I got tired of cleaning out airlocks. I put these into the mouth of the carboys (I always start two batches at the same time) and put the other ends into a gallon jug of clean water. Then I walk away, leave it alone for a couple of weeks or more. It's nice to walk into my beer room and hear the sound of the CO2 bubbling away. Works for me.
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Old 07-17-2009, 10:14 PM   #7
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Quote:
Originally Posted by jrkettle View Post
I use 1" ID vinyl tubing from HD. It fits perfectly.
+1. My only issue with this system is cleaning the dried krausen out of the tubing - it's too long for even my bottle brush to reach the center. I've had to tie string around a sponge and pull it through a few times. What a pain. I either need to shorten the tubing or figure out a different system.


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