Originally Posted by Yooper
...The other is hops utilization. If you were making a 75 IBU beer, I don't think it would be possible to do that with the addition of three gallons of water (1/5 of the volume).
Otherwise, I can't see an issue.
LEARNING ALERT...LEARNING ALERT!!!!
I was under the assumption that as long as you were pulling the adequate amount of alpha acids from the hops to hit your desired IBUs for your 15 gallon batch, but actually only had 12 gallons (from not yet adding the full amount of water) you would have a wort with a higher OG and higher IBUs. Then, if you added the remaining water to get you up to 15 gallons, and assuming everything went as planned in your brewing, your IBUs and OG would be back down to where you had planned for the recipe.
Obviously I am not understanding hop utilization correctly. Can you help me understand this? Thank you!!!