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Old 02-24-2011, 03:31 AM   #1
jpm5171988
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May 2010
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I have a 10 gallon rubbermaid cooler that I use as a mash tun. I've been using it for mashing 5 gallon batches, but just bought a bigger brew pot and want to do a 10 gallon batch. Will a 10 gallon rubbermaid cooler fit 24 lbs of malt with 9 gallons of strike water? Im afraid that it won't and don't want to risk screwing up my mash. For my 5 gallon cream ale recipe, I use 4.5 gallons of strike water so I figure that I should use 9 for a 10 gallon batch. If 9 gallons of water and 24 lbs of grain will not fit in the cooler, should I just mash twice (like i'm brewing two five gallon batches), or should I decrease the amount of strike water and increase the sparge amount? Im afraid if I decrease the strike water amount and increase the sparge water amount that it will not produce the same results. Is this assumption correct? Any advice would help. Thanks.

 
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Old 02-24-2011, 03:35 AM   #2
jafo28
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Aug 2010
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Check this out.
http://www.rackers.org/calcs.shtml

 
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Old 02-24-2011, 03:47 AM   #3
jpm5171988
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May 2010
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Oh wow, this is awesome. Thanks alot.

 
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Old 02-24-2011, 03:51 AM   #4
jpm5171988
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May 2010
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Ok, well that answered my main question. But now I have another question. My 5 gallon recipe called for 1.6 qt/lb of strike water. According to the calculator provided in the link above, I would have to lower my strike amount to 1.3 or 1.2 qt/lb to be able to fit it in my mash tun. I would then componsate by adding more sparge water. If I decide to do this, how will it affect my results? Will the taste change, will the gravity change?

 
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Old 02-24-2011, 04:17 AM   #5
devilishprune
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Mar 2010
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Probably not. Kaiser has some experimental data on his site that show a very minimal change in fermentability with mash thickness.

 
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Old 02-24-2011, 04:18 AM   #6
strat_thru_marshall
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Mar 2010
Oklahoma City
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should be fine, just beware that when you've got the mash tun that full it's really easy to make a mess when you're trying to get those last few pounds of grain into the mash.

 
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Old 02-24-2011, 03:57 PM   #7
Hex
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Oct 2009
Granite Bay, CA
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Here's 16 lbs of grist with 6 gal water in a 7.5 gal lauter tun/stock pot look like.
I direct heat the mash in a 9 gal kettle and ladle to this lauter tun. I don't have to add water to raise temperature....

 
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Old 02-24-2011, 04:00 PM   #8
BendBrewer
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Jan 2010
Bend, Oregon
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I mash up to 26 pounds of grain in my 10 gallon cooler using a 1 to 1 ratio. Have to split my sparge into 2 but it works great.

 
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