Also, your water numbers seem a bit off to me. 12.5 quarts of water plus the other 15 quarts of sparge water add up to 27.5 qts = ~6.9 gallons of water. The grains ate up well over a gallon for me which would have left me with 6 gallons or less before the boil, which is stated to be the batch size (post-boil volume). After the boil I would have been left with under 5 gallons for a "6 gallon batch". If I am wrong in anyway could someone point it out to me, becayse I brewed this 2 days ago and luckily I was able to RDWHAHB and think on my feet and just add an extra gallon or so to the 15 qt's in order to reach my proper pre-boil volume. By the way, I hit the OG of 1.048 on the dot.