So I am going to be attempting a full boil this weekend. I am still brewing extract but will be making a 10 gallon batch. I would like to try my hand at a full boil but I have a quick question.
Based on everything I have searched people say it depends, but I was hoping someone could give me a good average number of how much water I should start with if I was to doing a 10 gallon batch. 11 gallons? 12 gallons?
Thanks a lot for all of your help.
It depends 
What’s your kettle look like? Taller, narrower kettles, like a converted keg for example it’s probably about 1 gallon per hour. Wide kettles it’ll be more, say up to 2 gallons per hour.
If you want to dial it in for your system before brew day throw a few gallons into the kettle, measure at the beginning, and boil it for half a hour, and measure it at the end. That’ll let you estimate how much you’ll boil off on brew day.
Why didn’t I think of that! Perfect idea. I will try the boil off exercise.
I have 15 gallon megapot…so it is wide.
Thanks for the tip!
With extract unless you are adding it all at the start of the boil you’re volume will change when you add it in.
I do most of my extract as a late addition, so I would need to know my boil off rate as well as estimate the displacement/volume addition of the late add extract. I suppose it could be figured out, but…
good point. I think i am going to add all of the extract at the beginning. So the volume would be what…roughly 2 gallons (guessing) for a 10 gallon batch. expecting 1-2 gallon boil off. I will try it out this week prior to brew day.
I would think LME is one to one. I don’t know about DME.
Someone must have done this before.