Author Topic: When to use a blow off tube  (Read 2485 times)

Offline donredbull

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When to use a blow off tube
« on: February 21, 2013, 08:05:01 PM »
So when I was taught how to brew I was told after pitching and aeration to put a blow off tube on. But now that I have been reading more about brewing it seems like the standard practice is to put an air lock on and only attach the blow off tube if you need it. What do you all do? Does it matter if I just attach the blow off tube right after pitching? or am I just thinking about this way to much?

Offline yso191

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Re: When to use a blow off tube
« Reply #1 on: February 21, 2013, 08:49:40 PM »
I just always use a blowoff tube.  I may not need it, but that way I don't have to keep checking to see if I do.  They'll both serve the same function if you don't have krausen up into the neck of your fermenter and beyond - that's when you need the blow off tube.
Steve

Offline donredbull

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Re: When to use a blow off tube
« Reply #2 on: February 21, 2013, 09:11:56 PM »
Thanks for replying so fast

Offline The Professor

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Re: When to use a blow off tube
« Reply #3 on: February 21, 2013, 09:13:15 PM »
If your fermenting vessel is large enough, you don't ever need to use a blowoff tube. 
I don't think I've used one in over 21 years.
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Offline tygo

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Re: When to use a blow off tube
« Reply #4 on: February 22, 2013, 05:08:03 AM »
I'm usually trying to squeeze 5.5 gallons in a six gallon carboy so I almost always need one for ales.  I've learned my lesson and just put it on every time and replace it with the stopper and airlock when appropriate.
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Offline davidgzach

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Re: When to use a blow off tube
« Reply #5 on: February 22, 2013, 05:46:29 AM »
I'm usually trying to squeeze 5.5 gallons in a six gallon carboy so I almost always need one for ales.  I've learned my lesson and just put it on every time and replace it with the stopper and airlock when appropriate.

+1.  I always start with a blow off tube and switch to an airlock if I need to.
Dave Zach

Offline erockrph

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Re: When to use a blow off tube
« Reply #6 on: February 22, 2013, 06:17:51 AM »
Outside of weizens, I don't bother with them. But I brew smaller batches so I routinely have 30-50% headspace in primary. I just put some foil over my carboys, and with buckets I just put a dry airlock in the grommet to keep dust from getting in and lay the cover on loosely.
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Offline theDarkSide

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Re: When to use a blow off tube
« Reply #7 on: February 22, 2013, 06:33:43 AM »
I always use a blowoff tube and rarely ever bother switching to airlock.  I use 6 gallon better bottles with the orange carboy caps and it is so much easier sticking a 1/2" vinyl tube on the large port than trying to jam an airlock in there.
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Offline dbarber

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Re: When to use a blow off tube
« Reply #8 on: February 22, 2013, 06:44:59 AM »
The only time I use a blow off tube is when I use wyeast 3068 or 3787.
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Offline hokerer

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Re: When to use a blow off tube
« Reply #9 on: February 22, 2013, 07:12:23 AM »
I do 5.5 gallon batches in 6 gallon better bottles so I always use a blowoff.  Only time I might switch to an airlock would be for extended aging or something like that.
Joe

Offline kylekohlmorgen

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Re: When to use a blow off tube
« Reply #10 on: February 22, 2013, 10:21:14 AM »
Fermcap.

I can fit 5.5-6 gallons in a bucket and not worry about blow-off.
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Offline davidgzach

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Re: When to use a blow off tube
« Reply #11 on: February 22, 2013, 11:32:15 AM »
Fermcap.

I can fit 5.5-6 gallons in a bucket and not worry about blow-off.

The evil post! 
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Offline wort-h.o.g.

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Re: When to use a blow off tube
« Reply #12 on: February 22, 2013, 12:52:56 PM »
i use a 6.5 gal carboy and only ever needed blow off tube with weizens..other than that i haven't had any need.

Offline jeffy

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Re: When to use a blow off tube
« Reply #13 on: February 22, 2013, 12:56:13 PM »
I use carboys, usually a five gallon batch in a 6.0, 6.5 or 7 gallon carboy and use aluminum foil to keep things from falling into the beer until the kreusen falls, then I switch to an airlock.
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Offline hokerer

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Re: When to use a blow off tube
« Reply #14 on: February 22, 2013, 05:24:57 PM »
Fermcap.

I can fit 5.5-6 gallons in a bucket and not worry about blow-off.

I prefer the blowoff.  No questionable additives to my brew plus the blowoff gets rid of the "braun hefe"
Joe