I was just wondering about this. In say a five gallon batch if you started with five gallons boiled everything and then put it in the primary some will be lost to evaporation also some is lost to dumping or leaving behind trub during transfer. Would it be ok to use extra water to make up for this loss? Like say do a five gallon recipe or kit but boil 6? Or would this just result in watered down beer? If it's ok where would one draw the line on the extra water amount?