Curious if anyone has encountered this before. Just did my first all grain with a new set up. Put altogether about 10 gallons of water through the mash tun. Only wound up with 3 gallons in the fermenter after completing the boil. I was in way too much of a rush so I may not have rinsed my mash good enough. How much water loss to grains is normal? I used a 9 lb grain bill.
Normal absorption rate is about .12 gal./lb. That would mean just over a gal. for your 9 lb. of grain.