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Old 11-09-2010, 02:16 AM   #1
Gtrman13
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I'm just starting my first all-grain right now, woo! I'm doing a half recipe and using the easy stovetop all-grain thread as a guide. Anyway, my mash is going right now and I hit my target temp perfectly. Now I'm wondering how much strike water to use.

Here's what info I can give. 5 lbs of grain is mashing in 1.25 gallons of water currently. Now that it's cut in half, the batch size will be 2.5 gallons. The normal recipe calls for a 3 gallon boil, but I honestly don't know how this should be altered.

Basically what I need to know is how much sparge what I need to use, and what my boil volume should be. Thanks.
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Old 11-09-2010, 02:22 AM   #2
Bobby_M
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Easy, you'll get about .75 gallons out of the mash when you remove that grain bag. Dunk that bag into a pot with 2.5 gallons of "sparge" water. You'll start boiling 3.25 gallons and boil down to just over 2.5 after 60 minutes... probably.
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Old 11-09-2010, 05:40 AM   #3
Gtrman13
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Thanks for the timely reply! I followed your instructions and everything seemed to work well. My wort is cooling and I'm about to pitch onto a yeast cake for the first time. Anyway, now that I have the answers I needed, can anyone explain how I can calculate them myself next time?
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Old 11-09-2010, 05:52 AM   #4
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Quote:
Originally Posted by Gtrman13 View Post
Thanks for the timely reply! I followed your instructions and everything seemed to work well. My wort is cooling and I'm about to pitch onto a yeast cake for the first time. Anyway, now that I have the answers I needed, can anyone explain how I can calculate them myself next time?
You can count on ~0.1 gallons per pound of grain lost to absorbtion (you had 5 lbs of grain and 1.25 gallons water to start - so .5 gallons lost = 0.75 gallons after the mash).

You're loss during the boil will depend on your boil intensity (I usually plan for ~1 gallon/hour)

 
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