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Old 06-03-2007, 08:07 PM   #1
kappclark
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Default partial boil for 10 gallon batch - possible ?

HI:

I started out doing partial boils on stove for 5 gal batches, then got a 32 qt pot, and am doing 5 gal full boils.

I have extra fermenters and glass carboys -

I was wondering if I can use this existing equip to do 10 gal batches if I just double the ingredients. Boil 6 gals in pot, then add wort to chilled water in each fermenter. I cld even experiment with different yeasts since I wld use 2 fermenters.

I am not looking for any "BIG" beer with this system - just some simple English Ales which might require 12-14 lbs of extract for 10 gal batch.

Comments appreciated ..

Bill Clark
Windham, VT



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Old 06-03-2007, 08:25 PM   #2
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I think it would work fine and in fact I'm planning on trying the same thing myself. I need a lot of beer for an upcoming trip and don't have any extra time to brew.

Has anyone been doing double-batch partial boils (if that makes any sense)?



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Old 06-03-2007, 08:32 PM   #3
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Would certainly work, you would just need to be sure to get the same amount of the condensed wort into each fermenter or you would get different OG's (not that that is a big deal necessarily). You would probably want to add the cooled wort first so it is easier to judge - then top up with water.

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Old 06-03-2007, 08:40 PM   #4
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I was planning on eyeballing the wort between 2 buckets, then bridging the buckets with a siphon hose to equalize them before topping off.

Also plan on doing some yeast comparisons since I'll have 2 batches of identical wort.

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Old 06-03-2007, 10:58 PM   #5
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I was thinking of doing something similiar as well but more like a big PM. MAsh for a five gallon recipe and the add some extract later in the boil and split between the two fermenters and top off.

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Old 06-09-2007, 09:39 PM   #6
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Default water or wort first

Thx to all for replies -

I was thinking of aerating 2 gals of cold VT spring water FIRST by shaking containers .. add to fermenters, then pour cooled wort into vessels...I wld need to mark outside of fermenters with 5 gal marks, BUT ... if I poured too much wort into 1 vessel, then the second wld not have as much, altering the gravity ...

If I top off 1 fermenter with water, the OG in each batch will not be the same (but really - wld it be off by that much - the starting gravity is abt 1046

Very interesting ... how can you be sure that you are adding the sane amt to each fermenter so that the gravity is the same ...

I never thought of that

Bill Clark

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Old 06-10-2007, 04:03 AM   #7
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Yup, Sirsloop and I just made 17 gallons by boiling 11. I mean, with extracts you can go pretty concentrated and you're only limiting your hop utilization and possibly darkening the color a bit but boiling 2 for 5 is the same as boiling 4 for 10. Go for it.

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Old 06-10-2007, 03:47 PM   #8
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Quote:
Originally Posted by kappclark
... how can you be sure that you are adding the sane amt to each fermenter so that the gravity is the same ...
If you put a filled siphon hose between the 2 fermenters the fluid levels will equalize. The buckets need to be on the same level, like both on the floor.

Also, you don't need to aerate the spring water, it's already chock full of oxygen. It's the water (or wort) you boil that needs to be aerated to replace the oxygen that's been boiled off.
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Old 06-10-2007, 04:37 PM   #9
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Ok, so say you buy to 5 gal kits, do you use all the hops or not? How would you figure this? I can see using all the extract to go from 5 gal to 10, but I'm unsure about the hops.......

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Old 06-10-2007, 05:48 PM   #10
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I'm also concerned about hops. If you are able to double the boil volume for the kit then all should be well, but if you're reducing the volume of the boil you're also reducing hop utilization.

I'm considering boiling the hops only and adding the extract at the end (last 15 min).



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