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Old 11-19-2009, 03:52 PM   #1
EricM83
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Default Using a blow off tube...

What does everyone recommend? Should I use a 5 gallon primary fermenter with a blow off tube or use a 6.5 gallon with an air lock?

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Old 11-19-2009, 03:57 PM   #2
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I'd use a blow off tube even with the 6.5g fermenter. I have yet been able to determine when something will foam like crazy. I have a 6g Better Bottle carboy and my blow off tube setup is a 3/8" hose/stopper combination and even THAT was clogged by some thick foam once. Of course the next batch didn't even blow any foam.

For me, it's better safe than sorry.

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Old 11-19-2009, 03:59 PM   #3
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Even with a 6.5 gal fermentor there will be times when you will still need a blow off tube. Most people use them all the time in the begining just in case. Then switch to an air lock.

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Old 11-19-2009, 04:27 PM   #4
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My latest batch refused to be contaned by an air lock, so I had to switch over to a blow off tube. It was fermenting at a high temp, so I placed it in a bath to cool it, then took my syphoning tube and put it through the hole in the lid and the other end in the bath. Worked great. The tube was a little snug going in, but worked out really well.

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Old 11-19-2009, 04:35 PM   #5
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I would not recommend using the 5 gal fermenter for a 5 gal batch. I suspect you will loose lots of volume with all the blow off.

Use a bigger fermenter like a 6 or 6.5 gal. Even with those you may need a blow off.

I use the 6 gal better bottles. I start fermentation with a blow off. 90% of the time I need the blow off. I like to use the orange carboy caps. I attach a plastic tube to one of the outlets on the carboy cap and put the other end in a bucket of star san. Works great. When fermentation subsides I switch to a stopper with a regular 3 piece airlock.

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Old 11-19-2009, 04:38 PM   #6
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6 gallon with a blowoff, especially for bigger beers.



-Joe

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Old 11-19-2009, 04:41 PM   #7
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I would recommend Fermcap-S so you most likely won't have to ever deal with a blow-off.

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Old 11-19-2009, 04:47 PM   #8
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Quote:
Originally Posted by PseudoChef View Post
I would recommend Fermcap-S so you most likely won't have to ever deal with a blow-off.
It depends on the yeast strain. I learned this the hard way on my last batch. 10 drops of Fermcap in the fermenter did nothing to contain the Wyeast 3787 I pitched. I even dropped in more once the krausen climbed up to the airlock and it would not subside.
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Old 11-19-2009, 04:49 PM   #9
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Quote:
Originally Posted by PseudoChef View Post
I would recommend Fermcap-S so you most likely won't have to ever deal with a blow-off.
and then use a 5 gallon fermenter?

I think I would still want a 6 gal fermenter. When you siphon you always leave some crap in the carboy. So to finish with 5 gallons in the keg you need 5+ gallons in the carboy. Get the 6 gallon fermenter so you have extra space for the eventual bottom of the carboy crap. The 5 gal fermenters are best for long term secondary where you want to reduce the oxygen contact.
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Old 11-19-2009, 04:50 PM   #10
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Quote:
Originally Posted by EvilGnome6 View Post
It depends on the yeast strain. I learned this the hard way on my last batch. 10 drops of Fermcap in the fermenter did nothing to contain the Wyeast 3787 I pitched. I even dropped in more once the krausen climbed up to the airlock and it would not subside.
is that the weizen yeast cause that stuff goes ape ****.
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