3 gallon kit from northern brewer, about 9 lbs of grain. I heated 2.5 gallons of water to 164, place all my grains in it, it was at 4.5 gals so added another .5 gallons. Temp was at 153. For 75 mins what the procedure said. After it was done, I drain it and add 150F Water to get 4.2 gallons...