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Old 08-10-2010, 01:55 PM   #1
bh10
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Default Boiling off to much?

Lately Ive been noticing that my batchs that are suppose to be 5-5.5gals are coming in at 4-4.5 gallons. Is this do to a hotter boil or what? Ive been doing partial mash kits from AHS. Also does this effect the FG b/c mine is always on the low side?


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Old 08-10-2010, 02:02 PM   #2
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Boil-off is the most likely factor.

Partial mash could also be a factor. One thing it took me time to figure out when going to partials from extract plus specialty grain is that extract has a lot volume. If I took 5.5 gallons of water, added 6lbs of LME, and boiled for an hour, I ended up with a post boil volume of just over 5 gallons. When I went to partial mashing, I was initially doing the same thing and landing just under 5 gallons because I was losing half the volume of the LME I was adding in a full extract batch. I had to add that volume back in as mash water to get my post-boil volume right.


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Old 08-10-2010, 02:24 PM   #3
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Just increase your preboil volume and that should fix the problem.
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Old 08-10-2010, 04:05 PM   #4
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Quote:
Originally Posted by maida7 View Post
Just increase your preboil volume and that should fix the problem.
That wont effect OG?
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Old 08-10-2010, 04:12 PM   #5
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Quote:
Originally Posted by bh10 View Post
That wont effect OG?
Sure it will but the recipe was designed to finish with 5 gallons. If your finishing with only 4.5 gallons then your OG will be skewed high. Adding more to the preboil will get your post boil OG and volume to where it belongs.


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