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Old 08-25-2010, 02:29 AM   #21
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Originally Posted by Burgs View Post
It's been a few months and a lot of research since the first time I learned about this method & I'm wondering if I was over-complicating it before... I'm wondering if this will work:

I have an 8 gallon kettle with ball valve from Morebeer, they're kinda short and stocky so right off the bat - if anyone knows of a nylon grain bag that will fit around the rim of this kettle, can you let me know?
I just did my first BIAB in an 8gallon pot, recipe was 11lbs of grain. I used about 7 gallons of strike water and the grain came to the lip. I don't think I could do any more than 11 in the current pot size.

For material, I went to Hobby Lobby store and bought 2 yards of 100% polyester sheer curtain and a spool of nylon thread. Sewed up a double bag that fit over the pot and handles. It was tight enough that I didn't need clips or anything to hold it in place. You definitely want something to keep the bag from moving so you can stir your mash. You'll also want something to hang the bag from; there's a lot of wort to be had in the bag beyond just letting it drip.

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1. Heat 6 gallons to strike temp w/ bag in the kettle
2. Add grains, stir, cover

*might possible insulate my kettle a bit with towels, etc. at this point... but I know from recent experiments that it does hold temp fairly well

3. When mash is complete, fire up burner to mash out temp
4. When mash out is done, place grain bag in colander
5. Use the ball valve to grab some additional liquid to pour over grains
6. Dump spent grains and proceed with boil as usual

I'm thinking I either need to find a bag that I know won't hit the bottom when it's filled with grain or invest in a false bottom... since I'm going to be direct fired.
I ended up wrapping the pot with bubble foil wrap and covered the top with a couple towels. I still ended up needing some heat and I didn't have anything to keep the heat off of the bag, but it turned out to be fine for me; didn't scorch the bag or anything though I was constantly stirring the mash while heat was applied.

I didn't do a separate sparge, but I did start with close to 7 gallons (worked out to about 2.5 quarts per lb). With out the separate sparge, squeezing the snot out of the bag is highly recommended to ensure you get enough wort out of the mash for the intended boil volume.
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Old 08-31-2010, 07:50 PM   #22
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i did my first BIAB two days ago. no sparge method. simply let the bag drain and squeezed it gently. i double crushed the grain. double crushed grain does not absorb as much water (half as much or less) so take that into consideration as well. i ended up with more pre-boil volume as a result. efficiency 70%. added DME to hit target. the beauty in the whole deal was the cleanup. one vessel to clean and a bag of grain to toss in the soybean field next to my house. also was about 1.5 hours shorter than a "normal" brew day.

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Old 08-31-2010, 07:59 PM   #23
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If you have a decent sized pot already (don't buy one just for this purpose) you can dunk sparge for a few points efficiency increase. That was my problem with BIAB, though. I never had enough volume with my small kettle if I didn't sparge, but I didn't really have another pot to get a proper sparge on. I always destroyed my kitchen in the process.

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Old 09-30-2010, 04:06 PM   #24
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Originally Posted by prosper View Post
you can get 'game bags' for cheap at the local sportsman shop bass-pro, cabelas, etc. They're meant for dragging dead moose, elk and deer out of the bush, but they're the perfect size for various brew-day tasks, incl. BIAB.

They're also good for storing potatoes and onions
Like this?

http://www.cabelas.com/product/Delux...0&Ntt=game+bag
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Old 09-30-2010, 04:48 PM   #25
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that's the deluxe canvas bag. I'm sure it would work, but I usually use the cheap nylong bags, like these http://www.cabelas.com/product/Alask...0&Ntt=game+bag

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Old 09-30-2010, 05:22 PM   #26
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that's the deluxe canvas bag. I'm sure it would work, but I usually use the cheap nylong bags, like these http://www.cabelas.com/product/Alask...0&Ntt=game+bag
Now THAT'S more like what I'm after :P Thanks! Do you know what size would fit a converted keg? I got some 5gal paint strainer bags at home depot, just a few bucks for a 2pack to find out it won't fit my keg. They were so cheap I don't even want to return them, maybe I'll just use them to line my 48qt mlt cooler if I ever use that again.
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Old 09-30-2010, 05:39 PM   #27
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I just checked with my local Cabela's and they've got them in stock. I think I'll go for the 4pack for 9.99, the economy is 1.99 but I figure for a lil more may as well get the stretchable ones. Great find thank you!

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Old 09-30-2010, 08:26 PM   #28
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Now THAT'S more like what I'm after :P Thanks! Do you know what size would fit a converted keg? I got some 5gal paint strainer bags at home depot, just a few bucks for a 2pack to find out it won't fit my keg. They were so cheap I don't even want to return them, maybe I'll just use them to line my 48qt mlt cooler if I ever use that again.

I'm not sure what size you'd need. Any of them would work, I thing - they're pretty stretchy
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