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Old 06-20-2012, 05:18 AM   #1
Nov 2010
renton, wa
Posts: 206
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This question centers more around fermentors. I would imagine you need a 20 gallon mash tun / boil kettle to make enought beer to fill a keg.

15.5 gallons is the standard volume to fill it up.

The question then becomes what do you ferment in? I have seen kegs converted to fermentors but including head space would you not need more like a 20 gallon fermentor?

What are most people using to ferment and be able to fill up a full keg when they are done?

Right now I am brewing 5.5 gallon batches fermented in 6.5 gallon carboys. Gives me 5 gallons to completly filla corney keg.

But I am not seeing alot of inexpensive stainless options for filling a 1/2bbl from the fermentor
Strong Arm Brewing

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Old 06-20-2012, 11:26 AM   #2
jfrizzell's Avatar
Jun 2007
Posts: 686
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Better option might be to brew 10-12 gal and ferment in a sanke keg. Unless you want to step up o a larger fermenter.
Primary: Pliney the Elder Clone
Kegged: Tank 7 / Saison Brett

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Old 06-20-2012, 12:42 PM   #3
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May 2007
Jersey Shore, New Jersey
Posts: 9,902
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I just started fermenting 1/2 keg batches in a 20 gallon stainless kettle. Be forewarned, with a batch this big you will likely need to control the temp of fermentation. I keep mine in a plastic tub and toss in a little ice a few times a day to keep it in check.

People have used rubbermaid trash a bit...certain ones are food grade AFAIK. Another option is an HDPE 30 gal barrel.

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