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Old 01-11-2012, 10:03 PM   #1
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Default Will this work?

Well I'm brewing a batch and the directions are incomplete. This is all I know : 5 gallon batch
75% efficiency
Mash @ 148 for 90 minutes
Boil for 90 minutes
Add candi @ 20 min

I'm doing all grain I have all the ingredients but my deal is I don't know how much water to mash with or sparge with. Or what temp to heat sparge water to. I don't a batch sparge.


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Old 01-11-2012, 10:04 PM   #2
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Old 01-11-2012, 10:12 PM   #3
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How are you brewing then? Or are you asking how to do this WITH batch sparging?

For batch sparging (this isn't exact but it will make beer):

If you are doing full boil for 90 min then you probably want around 6.5 gallons PRE BOIL.

Dough in with enough water to submerge the grain by a few inches at ~150. (I don't know how much heat you loose in your process but I'm not sure if you do either...) Mash for one hour and collect your first runnings and note how much you collected. Then sparge with the remainder of what you need +.5 gallons or so. Wait 10 min and collect the rest of your wort.
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Old 01-11-2012, 10:15 PM   #4
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Typo : I do a batch sparge
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Old 01-11-2012, 10:49 PM   #5
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I'm gonna boil for 90 and mash for 90 so should I collect 6 gallons
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Old 01-11-2012, 10:58 PM   #6
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Are sparge and mash temp usually the same
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Old 01-11-2012, 11:05 PM   #7
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If you are doing a "mash out" which is used to stop conversion and prevent tannins, then you want to sparge with 170* water.

I usually try to get close to 170 but it does not matter too much because the runnings go right into my BK and the heat is turned on and conversion gets stopped in not too long.

You probably want more than 6 gallons, IMO I like to end up with extra rather than too little. Boil off rates vary but I don't know enough to say what affects it but average boil off seems to be between 1-2 gallons per 60 min boil. If you are going for a 90 min boil I would want to start with at least 6.5 gallons maybe 7... its all up to you though!
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Old 01-11-2012, 11:19 PM   #8
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This is how I do figire out how much water to use. Take the amount the recipe tells you you're supposed to wind up with. For example 5.5g. I know I lose 2 gallons in an hour boiling, so i'd figure on losing 3 gallons. Add that to the 5.5 to get to 8.5. Figure on losing around a gallon per 10 pounds of grain in the mash tun. Assuming you have around ten pounds of grain, Add that to the 8.5. So you start with 8.5 gallons of water. For me, I single sparge, so i'd split my water down the middle, mash with 4.25, then sparge with 4.25 and be done with it. You could add a half gallon for trub loss if you get lots of trub in,the kettle. This isn't anywhere near a scientific way of doing it, but it's what I do, it's simple, and I make good beer doing it. Someone will tell me i'n crazy, and it won't work, but it does for me.

If you want to work out temps in beersmith, which i'm guessing you don't have, pm me and we'll go through the numbers
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Old 01-12-2012, 01:12 AM   #9
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I can just keep boiling down right?
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Old 01-12-2012, 01:17 AM   #10
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I'm gonna try your numbers Mikey


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