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Old 02-23-2012, 07:04 PM   #1
kegboy5000
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Default Using a grain bag in a mash tun.

I've searched the forum, and i wasn't able to find a thread about this.

But has anyone ever used a Jumbo grain bag (like thoses used for Brew in bag) in their mash tun? I've done it twice and the only benefit to doing this is cleanups are faster. After sparging, i just lift the bag out, instead of scooping out the grains.

I just wanted to know if anyone else does this, and if you have any tips you would like to share.

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Old 02-23-2012, 07:16 PM   #2
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I started out BIAB in a 6 gal pot then got a 10 gal to do full boils. Now I use the 6 gal as a mash tun with the grain bag as a "filter." It works well but I do end up with a fair amount of trub in my fermentor.
Since you like the bag for easy clean-up, are you using a manifold/ woven stainless steel tube as a filter?

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Old 02-23-2012, 07:35 PM   #3
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Yes. I use a stainless hose fashioned from a waterline, in a 10 gallon igloo cooler. I mash and sparge as a normal mashtun would.

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Old 02-23-2012, 08:30 PM   #4
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Having done about 12 BIAB's now and some standard 2/3V before that, my tip would be - try a single sparge and then pull the bag out and squeeze and capture all the wort. The pH should be within an acceptable range which would allow for squeezing (without extracting tannins). Your bag may also be too coarse, in that case, I would use a bag made out of voile fabric.

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Old 02-24-2012, 02:20 PM   #5
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Quote:
Originally Posted by kegboy5000 View Post
But has anyone ever used a Jumbo grain bag (like thoses used for Brew in bag) in their mash tun? I've done it twice and the only benefit to doing this is cleanups are faster. After sparging, i just lift the bag out, instead of scooping out the grains.
I just dump the grain out into the garbage can. Doesn't get any faster than that. And I don't have to clean the bag afterwards.
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Old 02-24-2012, 02:26 PM   #6
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Another benefit of using a grain bag inside a mash tun or cooler is that you don't need build a manifold or braid to lauter, and also the chance of a stuck sparge is practically nil. Just lift the bag slightly if the runnings slow a bit.

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Old 02-24-2012, 04:02 PM   #7
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what's the estimated efficency with this method? i usually get 72% in my cooler/mash tun but cleaning it up is a b**** and if the bag helps and i won't lose much efficency, i'd love to try it

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Old 02-24-2012, 04:08 PM   #8
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what's the estimated efficency with this method? i usually get 72% in my cooler/mash tun but cleaning it up is a b**** and if the bag helps and i won't lose much efficency, i'd love to try it
If you are batch sparging, efficiency should be the same irregardless whether you use a bag, manifold or braid.
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Old 02-24-2012, 05:04 PM   #9
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I use a cooler with no manifold lined with a voile bag. I get in the 70's efficiency. Mash as usual, add sparge water (or dunk in pot filled with sparge water), stir, drain. I get trub too but I have been using a colander lined with voile on top of my fermenter when I siphon the wort in. Works well.

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Old 02-24-2012, 06:19 PM   #10
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I use this method. Using my bottling bucket and sparge bag. Batch sparge getting 80% eff. Take bag to garden. Dump turn inside out and spin Gets most of the grain out. Then rinse and clean

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