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Old 12-03-2011, 06:44 PM   #1
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Default Willa quick drain of the Mash affect my effi% ?

I have a 2 tier setup so when I drain my MT I use my March to pull it from the MT into the boil kettle. I pretty much have everything wide opened when I do this and it does drain really quickly. I also do this for the batch sparge as well. Ive been getting low eff numbers so Im trying to figure out if this fast drain would affect those numbers? Should I slow it down?

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Old 12-03-2011, 06:48 PM   #2
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The only reason I can think that it would effect it is the pump is sucking the wort so hard it is channeling the sparge water and not hitting all the grains. I open my valves completely, but let gravity do the work.

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Old 12-03-2011, 06:53 PM   #3
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As above. Throttle it back a bit and I'm sure you'll see improved #'s.

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Old 12-03-2011, 07:13 PM   #4
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Should I just throttle it back from the MT out or should I throttle back from the MT and the Pump in?

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Old 12-03-2011, 07:35 PM   #5
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Here's some good reading for you on lautering and efficiency. Should answer your questions.

BT - Fluid Dynamics -- A Simple Key to the Mastery of Efficient Lautering

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Old 12-03-2011, 07:47 PM   #6
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You always want to throttle on the "out" side of your pump, not on the "in" side.

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Old 12-03-2011, 08:13 PM   #7
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Guys, he's batch sparging. No, the speed of the drain has absolutely no effect on efficiency.

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Old 12-03-2011, 09:12 PM   #8
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Quote:
Originally Posted by Bobby_M View Post
Guys, he's batch sparging. No, the speed of the drain has absolutely no effect on efficiency.
Even if it is channeling during the batch sparge?
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Old 12-03-2011, 09:36 PM   #9
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No matter how you're sparging, efficincy can be gained by improving your lautering process. For instance, I get 70-72% efficiency consistenly from my 5 gallon batches in a cooler with a simple hose braid and a lauter rate of about .5 qt/min. I get 80-83% efficiency from my 30 gallon batches with a circular slotted manifold and a lauter rate of 1.5-2 qts per min. I batch sparge in both cases and usually brew batches with roughly the same OG. By adjusting your lauter process and flow rate around your MLT geometry, you can gain efficiency even when batch sparging.

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Old 12-03-2011, 09:41 PM   #10
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Quote:
Originally Posted by wedge421 View Post
Even if it is channeling during the batch sparge?
Correct. Batch sparging is about "rinsing" the sugars off of the grain by adding fresh water in one batch, and stirring like a crazy person to get the sugars into solution, and draining quickly.
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