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Old 11-23-2007, 04:33 PM   #1
efreem01's Avatar
Dec 2006
Hicksville, NY
Posts: 261

Hi All,

Just wondering what is the largest amount of grain you can get away with using a Rubbermaid 10 gallon cooler-MLT? I'm planning a BIG beer soon and it calls for almost 21lbs of grain with 5 gallons of strike water.

Thanks in advance for any help you can give.
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Old 11-23-2007, 04:37 PM   #2
Aug 2007
Posts: 65

About halfway down there is a form where you fill in how much grain you want to rack and how thick the mash and it will tell you how much room you need. Looks like 21lb @ 1.25qt/lb will take up 8.24gal. You'll be fine.

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Old 11-23-2007, 04:42 PM   #3
Funkenjaeger's Avatar
May 2007
Nashua, NH
Posts: 1,598
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Yep, the "can I mash it?" calculator is an invaluable tool. For a rule of thumb, I find that 12 pounds is a pretty reasonable limit for a 5-gallon cooler, and even that is sort of pushing it, especially if you hope to do a mash-out infusion without having to drain a bit of the first runnings to fit it in there. So, offhand, 24 lb is probably a reasonable rule of thumb for 10-gal coolers... with 21lb you should be fine.

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