Author Topic: brew bag question  (Read 1421 times)

Offline zman51

  • Assistant Brewer
  • ***
  • Posts: 106
    • View Profile
brew bag question
« on: October 15, 2017, 09:18:30 AM »
Hey all,

I am going to use a brew bag in my cooler (mash tun). I have read that I may end of with more wort than usual due to wort draining out of bag when pulling it out of mash tun. Although in one way this is good, I guess it would also dilute the wort down some. Should I adjust my mash sparge water volumes to compensate for this?

thx

Offline denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 18649
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: brew bag question
« Reply #1 on: October 15, 2017, 10:08:14 AM »
I didn't get any more wort than usual when I used a bag in my cooler.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell

Offline ultravista

  • Brewer
  • ****
  • Posts: 396
    • View Profile
Re: brew bag question
« Reply #2 on: October 15, 2017, 10:13:32 AM »
I squeeze as much wort out of the bag as possible. After the tun drains from the batch sparge, I sit the bag in a large mesh colander and let gravity have a go for a while. With a bit of prodding and pushing, I get another gallon out of the bag.

Because of this, I adjusted my Beersmith profile to have a BIAB grain absorption (.586) instead of all grain (.96). This nets me just the right amount of water & wort.

Offline BrewBama

  • Senior Brewmaster
  • ******
  • Posts: 1015
    • View Profile
brew bag question
« Reply #3 on: October 15, 2017, 01:16:15 PM »
+1. I get more wort when I began lautering with a bag vs without. I attribute this to completely draining the bag with a colander vs a less disciplined drain without. I don't squeeze.  I simply adjusted over time. It is very predictable now.


Sent from my iPad using Tapatalk
« Last Edit: October 15, 2017, 01:23:35 PM by BrewBama »
Huntsville AL

Offline denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 18649
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: brew bag question
« Reply #4 on: October 15, 2017, 01:28:16 PM »
+1. I get more wort when I began lautering with a bag vs without. I attribute this to completely draining the bag with a colander vs a less disciplined drain without. I don't squeeze.  I simply adjusted over time. It is very predictable now.


Sent from my iPad using Tapatalk

Maybe I was getting more wort of out my mash in the cooler and that's why I don't see a difference with the bag.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell

Offline HoosierBrew

  • Global Moderator
  • I must live here
  • *****
  • Posts: 12913
  • Indianapolis,IN
    • View Profile
Re: brew bag question
« Reply #5 on: October 15, 2017, 02:48:10 PM »
I reduced my dead space down to zero (from just over a quart) by going to the bag. The bulkhead/valve conversion I used had the braid sitting a little higher than when using the mini keg bung and obviously left more wort behind.. Regardless, I'm a big fan of the bag in cooler approach.
Jon H.

Offline alestateyall

  • Senior Brewmaster
  • ******
  • Posts: 1780
  • Tommy M.
    • View Profile
Re: brew bag question
« Reply #6 on: October 15, 2017, 03:09:47 PM »
I reduced my dead space down to zero (from just over a quart) by going to the bag. The bulkhead/valve conversion I used had the braid sitting a little higher than when using the mini keg bung and obviously left more wort behind.. Regardless, I'm a big fan of the bag in cooler approach.
Do you sparge? I have gone no sparge lately since trying LODO. I have been doing no sparge BIAB in my kettle. I have thought about going back to batch sparge with a bag to get improved efficiency. But,  haven’t yet because that might introduce oxygen. Which may or may not be a problem preboil.

Offline HoosierBrew

  • Global Moderator
  • I must live here
  • *****
  • Posts: 12913
  • Indianapolis,IN
    • View Profile
Re: brew bag question
« Reply #7 on: October 15, 2017, 03:20:30 PM »
I reduced my dead space down to zero (from just over a quart) by going to the bag. The bulkhead/valve conversion I used had the braid sitting a little higher than when using the mini keg bung and obviously left more wort behind.. Regardless, I'm a big fan of the bag in cooler approach.
Do you sparge? I have gone no sparge lately since trying LODO. I have been doing no sparge BIAB in my kettle. I have thought about going back to batch sparge with a bag to get improved efficiency. But,  haven’t yet because that might introduce oxygen. Which may or may not be a problem preboil.


No, I'm no sparging since the switch over, Tommy. I'm really happy with the results lately and like the direction things are going.
Jon H.

Offline alestateyall

  • Senior Brewmaster
  • ******
  • Posts: 1780
  • Tommy M.
    • View Profile
Re: brew bag question
« Reply #8 on: October 15, 2017, 03:35:09 PM »
I reduced my dead space down to zero (from just over a quart) by going to the bag. The bulkhead/valve conversion I used had the braid sitting a little higher than when using the mini keg bung and obviously left more wort behind.. Regardless, I'm a big fan of the bag in cooler approach.
Do you sparge? I have gone no sparge lately since trying LODO. I have been doing no sparge BIAB in my kettle. I have thought about going back to batch sparge with a bag to get improved efficiency. But,  haven’t yet because that might introduce oxygen. Which may or may not be a problem preboil.


No, I'm no sparging since the switch over, Tommy. I'm really happy with the results lately and like the direction things are going.
Me, too. I get 70-71% efficiency since switching versus 80% before. I have to remind myself efficiency is not a score. It’s the taste of the beer that matters.

Offline zman51

  • Assistant Brewer
  • ***
  • Posts: 106
    • View Profile
Re: brew bag question
« Reply #9 on: October 16, 2017, 05:50:20 AM »
good info, thanks everyone.