OzarkPA

Recipes 

Whew! Finally read the whole thread! I'm excited to have a new use for my 20g crawdad pot when they're out of season :-)

Re burning bags... Has anyone actually burned one? Reminds me about that experiment when I was a kid. Hold a flame under a styrofoam cup with water and without - check the results (have a receptacle for the one without.....)

Flatspin

Recipes 

Great thread! I have a sparging question, though. If you sparge at 170, then you are mashing out at the same time. So how does dunk sparging denature the enzymes in the original wort?

CanadianQuaffer

Recipes 

Would an 8 gallon brew-pot be big enough to do 5 gallion batches using the BIAB method?

eulipion2

Recipes 

Depends on how big your grain bill is. For most of my brews, my water amount is between 7-8 gallons (or more!), then add in the grains. FWIW, I'm one of those people who adds all my water and grain, no sparge.

For your size kettle you might need to use one of the sparge methods.

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CanadianQuaffer

Recipes 

Why so much water? I understand that the grain will absorb a lot of it, but don't you let the water from the grain drip back into your prew pot?

Cheers,

Nick

Mysticmead

Recipes 

Yes but not all will drip into the pot even when you squeeze the bag. To determine the amount needed use this formula. Batch size + absorption + boil off + trub loss = water needed. For absorption use grain in lbs. X .08 (or .05 if you squeeze the crap out of the bag like I do.)

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Perch06

Recipes 

Do you mean that you multiply grains in pounds x .08 and get a number in gallons? For example:

10# grain x .08 = 0.8 gallons of water lost to absorption?

houndsbreath

Recipes 

Making an American Stout via BIAB and drinking my own Belgian IPA modeled after Raging Bitch (tasty) as we speak. Smells like coffee and chocolate in the whole house; it's the darkest wort I have made yet and damn does it look good. I appreciate the genius behind BIAB each time I make a batch. keep it simple stupid!

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flyfisherwes

Recipes 

Let me know how the raging bitch stuff turns out. It's my favorite beer. I'll also be needing the recipe if it's good. Haha.

Mysticmead

Recipes 

that's it exactly. that number will give you a little extra in case you boil off more than anticipated. Once you have your system dialed in you can lower that number or raise it depending on how much or little you squeeze the bag. I squeeze the heck out of mine and use .05. here's an example of how I would use the formula.

5.5gallon batch
12lbs grain x .05 = .6 gallon absorption
trub loss .25 gallon
boil off in 1 hour 1.25

5.5 + .6 + .25 + 1.25 = 7.6 gallons of water needed. the nice thing about the formula is. It doesn't matter if you do a full volume BIAB like I do or if you sparge, you still need that much water.