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Old 02-24-2011, 02:31 AM   #1
jpm5171988
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Default 10 gal rubbermaid mash tun for 10 gallon mash?

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, 02:35 AM   #2
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Check this out.
http://www.rackers.org/calcs.shtml



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

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Old 02-24-2011, 02:51 AM   #4
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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, 03:17 AM   #5
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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, 03:18 AM   #6
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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, 02:57 PM   #7
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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, 03:00 PM   #8
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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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