Home Brew Forums > Home Brewing Beer > General Techniques > Primary Fermenting in a Corny Keg
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Old 09-23-2009, 07:18 PM   #1
Hugh_Jass
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Default Primary Fermenting in a Corny Keg

Does anyone primary in a corny keg?
I'm thinking of using some of my cornys as primaries. Replace the pressure relief valve on the lid with a bubbler, cut the dip tube to leave the trub behind and transfer from one keg to another under pressure from "out" to "out". I'd use fermcap when active fermentation began to lessen the krausen layer.
Any input from those who have tried this would be appreciated.

Thanks


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Old 09-23-2009, 07:24 PM   #2
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I use one that is messed up and wont work for serving as an apfelwein fermenter but I think to use it for beer you would have to be doing a 4 gallon or smaller batch. I drilled a hole in the lid and put a rubber gasket from an ale pail in so I can use a airlock. (I wouldnt suggest this if you ever want to use it to serve from again though.)


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Old 09-23-2009, 07:25 PM   #3
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You will be fine without changing anything. I would just take off the gas post and install my airlock there. Do a search for more information, as a lot of info has been on lately dealing with just such a thing .
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Old 09-23-2009, 07:29 PM   #4
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Worked fine for me the one time I tried it. Did a smaller batch w/o Fermcap as I don't like to add extra stuff to my beer. The nice thing is being able to put the post back on and transfer with CO2 to a fresh keg.
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Old 09-23-2009, 07:35 PM   #5
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You don't even need to remove the gas post. Just attach a gas QD to a piece of tubing and use that as a blowoff tube.
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Old 09-23-2009, 07:43 PM   #6
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Use fermcap and you can fill that bad boy all the way up. I have been strongly considering this lately too.
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Old 09-23-2009, 07:48 PM   #7
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Plus you could do pressurized fermentation, which sounds like it would be fun to play with
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Old 09-23-2009, 09:12 PM   #8
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Thanks guys.
I think I'm going to brew this weekend. I'll try to ferment in a couple of cornys with the dip tube cut and using the gray gas in qd with tube connected as a blow off.

Couple of follow up questions:

How much length should I take off the dip tube?

What is the best method of adding the Fermcap? I think I need to wait until active fermentation begins or the Fermcap will drop out of solution and be ineffective, correct?
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Old 09-23-2009, 09:23 PM   #9
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I don't cut my dip tubes. I just bend them slightly so they are off the bottom.
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Old 09-23-2009, 09:33 PM   #10
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I wouldn't cut the dip tubes at all. Leave the tube on the bottom, ferment, than add co2 and push the yeast out of the keg and then secondary in the same keg almost like using a conical. But that's just me and what I'd do


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