Author Topic: Est OG not affected by adding top up water  (Read 3142 times)

Offline iky0

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Est OG not affected by adding top up water
« on: August 25, 2011, 11:16:21 PM »
The estimated original gravity in my recipie is not being updated when i add top up water to the preboil wort. Since this is a fixed batch size (5 gallons post boil) I confirmed that the est preboil volume is the same with and without the kettle top up. As a result, an increase in top up means a decrease in sparge (which i confirmed is happening in the recipie). I would think that by replacing sparge water with pure water, the OG should decrease. Am i incorrect in my assumptions?

Offline Homercidal

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Re: Est OG not affected by adding top up water
« Reply #1 on: September 09, 2011, 08:23:36 AM »
Makes sense.  However, I posted wanting to know why the OG doesn't change when I increase the boil length.  The answer I got was that it will not change the OG in BS, even though we all know that a longer boil will increase gravity.  So I was either given wrong information, or there is a fundamental flaw in the software IMO.

Offline Homercidal

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Re: Est OG not affected by adding top up water
« Reply #2 on: September 09, 2011, 08:58:17 AM »
After some more thought, I think that BS is working as designed.  It's likely set to determine starting volumes based on OG, not the other way around.  You may have to use some of the additional tools to figure out your needs.  There is apparently no way to get BS to modify the OG based on boil length or preboil volume, only the other way round.