Preboil For 70 Liter Kettle

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fergi

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guys i have just bought 3GGG ,s beerbelly 70 liter kettle for doing double batches, usually around 1040/1050 beer,

in my single 40 liter kettle i used to preboil amount of 28 liters to get 23 liters after 60 minutes boil.

when i do double batches .what preboil amount should i have into the kettle to finish with 46 liters, anyone have the 70 liter beerbelly that i can compare to, i will adjust my volumes after i have run my first batch through.


fergi
 

argon

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My pre-boil in my 70L SS pot from Craftbrewer is typically about 52L for a 43L knockout... completely stress free, not having to watch for boil-overs.

edit: So i guess 55L should do it for you
 

Aces High

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For 46L into the fermenter i start with 64L. This is based on a 58cm wide pot with an evaporation rate of almost 11L / hour and doing BIAB

Heres all the data

Biab.JPG
 

cdbrown

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I would have thought somewhere between 51 - 55L if looking for 46L post boil in pot. If it has the same diameter as the 40L then the boil off will be about the same - given the same rolling boil strength.

In my 50L keggle I normally have a pre-boil of 46L and watch it like a hawk until it's in a good boil, then top up 5L post boil. Gives 47L post boil (3L lost to break, 2L loss to cooling). End up with 42L into fermenter.
 

rehab

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Sorry to jack the thread but I have the same question but with a 31ltr pot and wanting 20ltrs to go into the Fermenter... any help appreciated B)

Chris
 

RagingBull

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@Stillinrehab. Depends on a few factors - surface area, intensity of boil, loss to trub/hops etc. but couple of options:

1. Plug it into beersmith and get an estimate.

2. I reckon given a tightass boil, 26L in.. 60min boil 20L out. 90mins to drive off DMS, 30L in, 20L out.

Time, Trial and error will get you to know your system best
 

fergi

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thanks for the info guys appreciated.

argon what size burner are you using for your 50plus liters, i have a 3 ring burner but i think i will need to get a bigger adjustable regulator to do the job.
might have to drill out the holes a bit too.
fergi
 

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