Onebeer.net :: Homebrew :: Batch Sparge Calculator
I used this today and wound up way short of my calculated runoff goal.
Here are the values I inputted:
Total grain: 11.5 (lbs)
Total wort pre-boil: 6.5 (gal)
Mash water ratio: 1.25 (qt per lb)
Grain absorption: .125 (.125 gal per lb is generally accepted)
Mash/Lauter deadspace: .5 (gal)
Now, I kept .125 as the default. I am assuming that this is the thing that screwed it up. I don't know the absorption (yes, I know.. buy BeerSmith), so I just went with what they said.
I mashed with just over 3.5 gal, as suggested by AHS and the calculator. 60 minutes at 150 F. Anyway, after draining the first runoff, I got 2.25 gal, not 3.25 as the calculator indicated. I am certain that I do not have a stuck sparge.
It also indicates to add 3.25 gal for the second runoff.
So, I am currently heating 4.25 instead of 3.25 since the first runoff was a gallon short. Is this the right thing to do?
So WTF happened here? Was the grain absorption just that much higher than their estimation or did I do something wrong?
10.5 lb Belgian Pilsner
.5 lb Vienna Malt
.5 lb Cara Vienne