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Old 11-02-2011, 12:13 PM   #1
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Default Can I Mash 13 lbs. in my 5 gal Mash Tun?

It's the cylindrical Rubbermaid with a valve kit and stainless braid. Anyone ever go up to 13+ lbs. on these things?

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Old 11-02-2011, 01:09 PM   #2
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I've fit around 12.5 in one. You could maybe fit 13.

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Old 11-02-2011, 01:16 PM   #3
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This is a sticky in the equipment forum. If you mash slightly thicker than 1.25 qt/lb then it will fit.


http://www.homebrewtalk.com/f11/how-...-needs-123585/

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Old 11-02-2011, 01:18 PM   #4
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The brew club the Green Bay Rackers have a calculator: http://www.rackers.org/calcs.shtml

according to them the mash would take 5.1 gallons of space.

You might be able to adjust the mash thickness though and squeeze it in.

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Old 11-02-2011, 02:34 PM   #5
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I regularly mash 6kg in a 18 liter mash tun (which is pretty close to that). I drop to 2.3l/kg (1.1qt/lbs I believe).

Lots of sparging required...

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Old 11-02-2011, 02:39 PM   #6
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I mash in a 5 gallon kettle for now and I've pushed the limit with 13.31 lbs with a thickness of 1.23. Won't be doing it again though.

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Old 11-02-2011, 02:40 PM   #7
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Like others have said, by decressing the water to grain ratio a bit you can do it. I've done 14 pounds. Use the greenbay rackers calculator to figure out how much to squeeze in there.

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Old 11-02-2011, 05:12 PM   #8
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Did 23.75# in my 10 gal cooler for a doppelbock recently...trying to stir that mofo was no fun at all.

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Old 11-03-2011, 12:00 AM   #9
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1# grain + 1 qt water - 1.32 qt, so 13# grain at 1 qt/lb = 4.29 gallons.
I've done 13.5# at 1 qt/lb, and had a couple inches free space at the top.

-a.

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Old 11-03-2011, 01:22 AM   #10
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Thank-you everybody for all of the replies, was at work so I just got to read them all now! I think I'll go with 1.1 quarts per pound, that wont be too thick (hopefully) and should leave me some wiggle room on top. At least I don't have to worry about a false bottom taking up any of my free space... maybe I'll take some pics on Friday and update.

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