Originally Posted by phull
I am attempting my first all grain batch tomorrow and I have a few noob questions.
I am doing a 2.5 gal batch and have downloaded the trial version of promash and am trying to wrap my head around all the data. my grain bill is 6.77 lbs and my main concern is nailing the water amounts for the mash, mashout, and sparge. As of now I am planning on mashing with about 2.11 gallons and batch sparging with about 3 gallons. Is this anywhere close to what is needed? It seems like alot seeing as my end goal is 2.5 gallons.
I am sure the needed information is somewhere on the database and I have been searching nonstop but things are starting to run together and get confusing so I just wanted to get my head straight. Thanks!
I suggest using 1.25 quarts per pound for a small grain bill like that for mashing. So, 6.77 pounds x 1.25 quarts = 8.46 quarts (Call it 8.5). You can expect the grain to absorb about .125 gallons per pound, so you'll lose about .85 gallon in the first runnings.
That will leave you with (2.125 gallon - .85 gallon) 1.27 gallons out of the mash. You can then sparge up to your boil volume.
You will probably boil off a gallon or a 1.25 gallons in an hour boil so for a 2.5 gallon batch you'll probably want to start with 3.75 gallons for the boil. That means you'd want to sparge with approxmately 2.5 gallons or so.