Making a 15 gal brew from a 10 gal by dilution
#1
Posted 02 February 2010 - 05:55 AM
#2
Posted 02 February 2010 - 06:32 AM
Edited by Stout_fan, 02 February 2010 - 06:35 AM.
#3
Posted 02 February 2010 - 09:30 AM
#4
Posted 02 February 2010 - 11:16 AM
#5
Posted 02 February 2010 - 02:25 PM
#6
Posted 02 February 2010 - 02:35 PM
#7
Posted 02 February 2010 - 03:26 PM
#8
Posted 03 February 2010 - 06:56 AM
Yep. IBUs are a measure of concentration and follow the equation: V1 X B1 = V2 X B2, where V is volume and B is IBUs. In your case it would be 15 gal X 20 IBU = 10 gal X B2.BTW, a similar equation works to predict gravity at any volume from a known starting gravity and volume. Just replace the B's with G's (gravity in whole numbers ex 1.035 would be entered as just 35.)....George, so if I was aiming for 20 IBU in the finished 15 gallon batch, I should be shooting for 30 in the 10 gallon batch before dilution? No flav/aroma in this beer.
#9
Posted 03 February 2010 - 09:52 AM
#10
Posted 03 February 2010 - 09:55 AM
#11
Posted 03 February 2010 - 10:10 AM
#12
Posted 03 February 2010 - 11:52 AM
As you and I said, Promash does this automatically if you set the boil volume and final volume to unequal amounts. (That's not the default setting, IIRC. You have to change a setting to allow them to be different.) If you're using another program that doesn't do this, you can trick it by setting the boil volume in your brewing program to 10 gallons. It will then take the higher boil gravity into account when it tells you how much hops to use to get the 30 IBU's.Right formula George, but extraction is lower in high gravity beers, so it would have to be a bit more than just an equivalent after dilution.
#13
Posted 03 February 2010 - 12:57 PM
#14
Posted 04 February 2010 - 06:07 AM
Yes boil the water.Hot water into plastic jug; if too hot it could have plastic go into solution. Also jug must be sanitized.I use a CFWC. So all I do is yank the QDC off the BK and jack it onto the HLT QDC.If you are using an immersion cooler, just do the BK first then the HLT later.... I guess I should boil the dilution water too? I was thinking about doing that, and putting the hot water into a plastic water jug until it was cooled.
#15
Posted 04 February 2010 - 08:53 AM
Edited by McNuggets, 04 February 2010 - 09:04 AM.
#16
Posted 04 February 2010 - 11:27 AM
I've done that when diluting beers after fermentation when it's important to be as oxygen free as possible. Just make sure you pressurize the cornie with something as it cools - oxygen or sterile air would be best for your pre-ferm but CO2 works if it's all you have- or it will probably break the seal as it contracts and compromise its sterility. Nice thing about the cornie is that you can refrigerate it and use it as part of the wort cooling process....Edit - I could probably just put the hot water into a sanitized corny...
#17
Posted 04 February 2010 - 02:57 PM
#18
Posted 05 February 2010 - 06:49 AM
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