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Old 05-18-2014, 06:28 PM   #1
JonBrew
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Default Is it OK to dilute wort post boil?

I'm not able to boil much more than 15-16 litre in my brew pot so I typically end up with about 11-12 litres of wort. I want to make bigger batches though so could I dilute a concentrated wort after the boil with sterilsed (boiled) water?

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Old 05-18-2014, 06:41 PM   #2
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Yes you can. I did (and many do) just that when I started brewing. Just keep everything nice and clean, and you can use the pre-boiled and cooled water to help cool the wort.

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Old 05-18-2014, 07:11 PM   #3
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Great. I thought it would work but imagined it might detract from quality. What sort of results have you (anyone else) had?

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Old 05-18-2014, 07:42 PM   #4
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Depending on your water source you could boil some water, let it cool and put it in the freezer in a sanitized container. Dump it in your hot wort to cool it down.

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Old 05-18-2014, 07:50 PM   #5
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Exactly what I was doing not too long ago. Get around 3-4 gallons of 1.080 or 1.070 wort, then add water to bring it to where I want it to be for that batch usually 1.045-1.060. Quality will not suffer.

Alternatively you could try to do a second dunk sparge and try to get more sugars from the grain bag, then use that as top up water after a boil. I was just doing a batch and ran the numbers. I could get 45L in the fermenter if I used tap water, or based on the second sparge I could get 48L. Was the boil worth gaining another 3L of beer? Probably not. But it's an option and depending on numbers of the day it may be a good one.

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Old 05-18-2014, 08:03 PM   #6
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I always top up with unopened 1-gallon bottles of distilled kept in the fridge. Already sanitary, no change to your water chemistry, and as said cools the wort. Usually at least 2 gal of my 5 gal batch is added this way, and so far I've managed to avoid needing to buy a wort chiller (just a sink full of ice water to part-chill the hot wort).

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Old 05-18-2014, 08:04 PM   #7
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Quote:
Originally Posted by JonBrew View Post
Great. I thought it would work but imagined it might detract from quality. What sort of results have you (anyone else) had?
Lots of things effect quality of the final product. Full boils can create a better prudoct, but I don't think it's worth worrying about until you can cool a full batch fairly quickly (Australian style no chill being an exception), and have some handle on fermentation temps.

More on full vs partial boils here: http://www.homebrewtalk.com/f39/full...l-boil-324533/

and here: https://www.google.com/#q=site%3Ahom...l+vs+full+boil

:-)
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Old 05-22-2014, 03:29 PM   #8
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I think, depending on the style maybe, that you can make just as good a beer with a partial boil. Just understand that your hop utilization will be less with a higher gravity boil.

You could also add boiling water during the boil, say 1 qt at a time. If you don't have a wort chiller, you might not want to do that, though.

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