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Old 02-10-2009, 04:40 AM   #1
Gumbys_Brew
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Default corny as fermenter

i'm thinking about using a corny as a primary does anyone have any pics using a corny as a fermenter? i think i might go eith a blowoff tube connected to the gas in disconnect. not sure how it would work due to clogging.

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Old 02-10-2009, 04:48 AM   #2
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most people use them for secondaries. This is due to the massive amount of blow off you will have as there is no headspace for a 5 gal batch as well as the slender design causing higher foam then in a carboy. Some people use fercap for primaries though.

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Old 02-10-2009, 04:53 AM   #3
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oh ok gotcha. what is fercap?

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Old 02-10-2009, 05:12 AM   #4
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I think its a great idea. The challenge is fitting an air lock to the big opening. A sanke keg has a small opening that an air lock may be fitted if your handy.

After the beer is done fermenting close it up and hook it up to the CO2. Then draw off the trub at the bottom and throw out. Let the keg set and clear for another couple of days or what ever, then draw off the crap at the bottom again.

There, now your drinking great beer fermented in the same keg its being served from.

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Old 02-10-2009, 05:27 AM   #5
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I use them as fermenters. Generally the easiest way I found was to take off the gas plug and take out the gas dip tube. I then just stretch a piece of 3/8" inner diameter silicone tube over the threads, and then push an airlock into that.

It is a lot easier than it sounds. I thought I had a pic around here somewhere hmmm

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Old 02-10-2009, 05:32 AM   #6
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I'm getting ready to try it also. There is a brew shop locally that sells used cornies for $25 and new o-rings for $4. It's cheaper than a carboy and more useful too! I'd rather be collecting kegs than carboys. I like the idea of racking to another keg through a closed system. I'm thinking that I could clean several cornies at a time by soaking them in my bathtub with lots of oxyclean. How much easier could it get???

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Old 02-10-2009, 06:57 AM   #7
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I believe byo had a article about using a corny as a fermenter.You would use a extra ball lock or pinlock connector depending on what style keg and run a line into a bottle of starsan or water like you would a blow off tube.

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Old 02-10-2009, 09:43 AM   #8
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There are a lot when you search, but here is one thread. Here is a pic I put on another one



I do keep my blow off bottle in a bucket for the first day or two, to be safe. My Belgian Triple over flowed for 2 days, and is still bubbling after over a week in primary (going into day 10 now). Feel free to PM me if you have anything you're not sure about after searching (or post).

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Old 02-10-2009, 11:05 AM   #9
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If you use a gas disconnect with a hose like the picture above, take the poppet out of the post and remove the spring and pin from the disconnect.

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Old 02-10-2009, 11:26 AM   #10
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One thing I'm not clear on regarding using a cornie for primary, is temperature control. For lagers I see simply filling it up and tossing it in the kegerator... for ales, is it that simple? Do the stainless walls of the cornie hold in the heat more than plastic causing a higher fermentaion temp? Also, does using a plastic strip thermometer accurately reflect the wort temp? Thanks to all..........

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