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Old 11-15-2006, 05:18 PM   #1
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Default Whole Hop Absorption

I searched here already, and found a few leads, but they all ended up taking me nowhere.

Does anyone have any ball-park figures for the amount of wort absorbed by whole hops?

-walker


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Old 11-15-2006, 05:43 PM   #2
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I am actually interested in knowing this as well, as I have a few ounces of whole hops that I picked myself back in September sitting in my fridge, and it sounds like people are losing valuable wort.


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Old 11-15-2006, 05:44 PM   #3
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I usually sparge them anyway...as I pour my wort into the primary.
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Old 11-15-2006, 06:17 PM   #4
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The closest thing I found to a real number (on this forum) was from david_42 who estimated that someone should throw in "a couple extra quarts of water" to account for absorption of a 3.75 oz of whole hops.

So... that number comes to (fudging things) 0.5 quarts/oz.

In another post, someone declared that they only lose "at mose a couple of cups" of liquid to hops absorption, but they never said how many oz of hops they typically use.

0.5 qt/oz seems maybe a bit high, but not totally unreasonable, but I would love to find someone who actually has some emperical data.

-walker
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Old 11-16-2006, 12:24 AM   #5
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I don't really know...I guess Promash doesn't take this into account? Probably not...actually I think it goes in the Brew Session "Water Needed" page under "other absorption".

I'm curious, as well.
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Old 11-16-2006, 12:36 AM   #6
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4 oz whole hops absorbed 48 oz wort when I measured this a few months ago.

I weighed the kettle after racking to fermenter on the kitchen scales (accurate to within two ounces), I then cleaned the kettle, and drained some water with the kettle tilted to the same angle as it was when I racked, and re-weighed.
The clean kettle weighed 52 ounces less, but I had added 4 ounces of hops during the boil.

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Old 11-16-2006, 12:39 AM   #7
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I squeeze my hops to get the wort back. I do the same with the grains.

 
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Old 11-16-2006, 01:26 AM   #8
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Quote:
Originally Posted by Snippity
I squeeze my hops to get the wort back. I do the same with the grains.
I'm not sure that either of these are good practices. I'm almost positive that squeezing the grains is a bad thing - manual tannin extraction...blech!
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Old 11-16-2006, 03:06 AM   #9
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Quote:
Originally Posted by ajf
4 oz whole hops absorbed 48 oz wort when I measured this a few months ago.

I weighed the kettle after racking to fermenter on the kitchen scales (accurate to within two ounces), I then cleaned the kettle, and drained some water with the kettle tilted to the same angle as it was when I racked, and re-weighed.
The clean kettle weighed 52 ounces less, but I had added 4 ounces of hops during the boil.

-a.
awesome info! thanks.

this is lining up with other info I have dug up after an evening of google pounding.

It seems to be anywhere from 0.25 to 0.5 quart/oz, which has a mean value of 0.375. A few references said "1/3 quart", and I even saw a couple of direct "3/8 quart" and "3/4 pint" quotes (0.375).

Now... your data comes out as 0.375 qt/oz.

Who do we contact to make this official? Papazian? Palmer?

-walker
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Old 11-16-2006, 03:10 AM   #10
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Well, this is going to make me modify my water needed chart...



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