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Old 12-19-2008, 12:19 AM   #1
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Default Actual Capacity of a 5 Gallon Carboy?

I'm going to begin using a 5 gallon glass carboy for the purpose of dry-hopping. I'm curious, is a 5 gallon carboy exactly five gallons when filled to the absolute brim, or is there maybe a quart or so of headroom?

I'd like to get as much of my brew into the carboy as possible, and generally do batches that tend toward 5.25 gallons. If I can't get it all in there, would putting the excess in a glass jug (with airlock) be an acceptable alternative, then recombine at bottling?

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Old 12-19-2008, 12:47 AM   #2
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I'm going to begin using a 5 gallon glass carboy for the purpose of dry-hopping. I'm curious, is a 5 gallon carboy exactly five gallons when filled to the absolute brim, or is there maybe a quart or so of headroom?

I'd like to get as much of my brew into the carboy as possible, and generally do batches that tend toward 5.25 gallons. If I can't get it all in there, would putting the excess in a glass jug (with airlock) be an acceptable alternative, then recombine at bottling?
I think most 5 gallon carboys would fit 5.5 or even 5.75 to the bung. I've never actually measured it, but I know that I have had way more than 5 gallons in the bottling bucket. I guess you could use milk jugs and fill it with water and use a sharpie and mark the volume and know for sure. I've never thought that far ahead!
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Old 12-19-2008, 12:53 AM   #3
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I used a milk jug to find the 5 gallon level in my carboy. But the milk jug was a little more than a gallon. Use a quart measuring cup to fill the jug up to a gallon, mark it,then use the jug to fill carboy to 5 gallons and mark that. I also find that the milk jug marked exactly to the gallon is handy for mixing iodophor in the proper ratio.

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Old 12-19-2008, 01:18 AM   #4
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http://www.homebrewtalk.com/f11/actu...-carboy-89216/
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Old 12-19-2008, 02:27 AM   #5
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i can confirm. All mine are calibrated and the 5 gal holds 5 to the very top, the 6.5 gal carboys hold 7.5 filled to the very top
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Old 12-19-2008, 02:48 AM   #6
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Because it's glass each one will vary sometimes drastically (ie. one might be 5.5, another might be 5.25)

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Old 12-19-2008, 02:51 AM   #7
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Yikes, I'm glad I checked. Mine holds exactly five to the very, very top. Lame...I'll have to go grab a 6 gallon better bottle and use that as my secondary. Top off with marbles if need be.

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Old 12-19-2008, 03:41 AM   #8
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I'd say 18.9 l

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