is it too late to add water?? - Page 2

**Polboy** · 10-12-2011, 07:24 PM

and one bonus question, how much of cooled, post 60min boil worth would you get from your equipment if you would use the same condition as me (23lbs of grain, 7gal mash and 7.5 sparge water), i want to know how much volume im loosing compared to other people

**Yooper** · 10-12-2011, 07:31 PM

Quote:

Originally Posted by cciszew

and one bonus question, how much of cooled, post 60min boil worth would you get from your equipment if you would use the same condition as me (23lbs of grain, 7gal mash and 7.5 sparge water), i want to know how much volume im loosing compared to other people

I usually "lose" .125 gallons of water per pound of grain in the mash. So, that would be 2.875 gallons that I'd not have after the mash. I boil off about 1.5 gallons per hour.

So, I mash with 1.25 quarts of water per pound of grain. That's a tad over 7 gallons, and I'd get out 4.31 gallons. I'd then sparge with about the same amount you did- to get a boil volume of 12 gallons. I'd end up with 10.5 in the boil kettle, and then 5 gallon in each fermenter since I leave about .5 gallons in the kettle as trub losses.

You could start with mashing more- 1.5 quarts per pound and then plan on sparging up to your boil volume. That would probably make it a little easier to figure out your volumes. Do you know how much you boil off in the hour boil? Did you take a preboil gravity?

**Polboy** · 10-12-2011, 07:50 PM

i didnt take preboil gravity (im new but i dont see a point of doing that, even after temp adjustment it is not very accurate and i dont like to handel neer boiling liquids), im not also sure how much i boil of but im using open kegel and big a$$ burner than i have to keep less than half open to have a nice roll. Im biggest problem is that my boiling kegel is european 50 litters size, that is 13.2 US gal and not 15.5 which would be perfect for 10gal batches, with 13.2 i have to be really on spot with my preboil volumes and watch the flame a lot to catch boilovers

xenophobe2020 · 10-12-2011, 07:54 PM

Quote:

Originally Posted by joeybeer

I found an awesome article !

wow, nice find. thanks for sharing. I could see a lot of practical uses in my own setup for brewing like that......

joeybeer · 10-12-2011, 09:43 PM

Me too .. Splitting a 5gal batch into "strong" and "session" will be cool.. Let's face it, you can't bring a 7.5% IPA to a superbowl party

joeybeer · 10-12-2011, 10:38 PM

The plot thickens !
Check out these calcs : http://homedistiller.org/dilute.htm. (near the bottom of the page)
I could have put 1.75 gallons of water in a corny and filled it with the 6.1% APA to make beach beer !!

To make it even easier, I sent the article I linked before to a brewing friend that's an engineer and his response was :

Sounds like a pain to have to boil it and cool it quickly, but not a bad
idea. I think you could put a top on it and cool it slowly. Here's an idea
so that it doesn't implode. Boil 2 or 4 gallons water (for 5 gallon or 10
gallon batch). Then dump the boiling water into a corny keg. Immediately
seal it and pump in come CO2. drain out the o2 once or twice and refill
with CO2. There will be no oxygen to absorb and because you pressurized it,
it will not want to implode as it cools.

Does anyone know how to calculate what psi I'd need to keep the corny from collapsing ?