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Home Brew Forums > Home Brewing Beer > General Techniques > BIAB draining question
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Old 04-19-2010, 02:20 PM   #1
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Default BIAB draining question

What techniques do you guys use to drain the wort from BIAB? I spin it to create pressure on the grains, but how long are you supposed to wait?

For my last 2 batches I have been super high on my grain absorption and my gravities have been way high (1.086 when it should have been 1.052). My mash temps have been good and I mashed in w/ 1.5 qt per lb.

Just curious if anyone has some good ideas or has conquered this beast.

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Old 04-19-2010, 02:40 PM   #2
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What techniques do you guys use to drain the wort from BIAB? I spin it to create pressure on the grains, but how long are you supposed to wait?

For my last 2 batches I have been super high on my grain absorption and my gravities have been way high (1.086 when it should have been 1.052). My mash temps have been good and I mashed in w/ 1.5 qt per lb.

Just curious if anyone has some good ideas or has conquered this beast.
I do the spin, & hold the bag for a couple minutes. Then I set the bag in a colander that is sitting over the top of my bottling bucket. Just before my kettle gets to a boil, I dump the rest of the wort that has drained from the bag.
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Old 04-19-2010, 04:54 PM   #3
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I sparge in my brew bucket. Drain with a colander.

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Old 04-19-2010, 09:51 PM   #4
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I hold it over and do some gentle pushing on the sides. You don't want to squeeze it too much because you can accidentally extract some tannins.

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Old 04-19-2010, 09:53 PM   #5
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hold for a couple minutes. I did this with a single bag with 23 pounds of grain (more like 40 pounds wet) last weekend. It is a workout.

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Old 04-19-2010, 10:04 PM   #6
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For regular brews I just lift it and let it drain a couple of minutes before dropping in the sparge bucket.

For big grain bills that I don't want to hold that long, I put the bag inside the steamer basket that came with my pot, with a couple of wooden slats running across the top of the pot to set the basket on.

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Old 04-19-2010, 11:36 PM   #7
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23 pounds? Yikes! Was it a 15 gallon batch?

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hold for a couple minutes. I did this with a single bag with 23 pounds of grain (more like 40 pounds wet) last weekend. It is a workout.
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Old 04-20-2010, 02:34 AM   #8
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I bought a grill grate that I can put over the kettle. Unattended, it will not keep the grain from spreading out to drain outside the kettle, but it does take the weight while I am twisting and waiting for the bag to drain.

I might try to rig up some kind of skyhook in the future, as I could leave that to drain on its own. The colander in a bucket also sounds like a good idea.

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