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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Fly Sparge: To stir, or not to stir
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Old 11-05-2013, 09:36 PM   #1
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Default Fly Sparge: To stir, or not to stir

I've had some conflicting info lately. I fly sparge with a keggle MT setup (false bottom with dip-tube). My problem has been that I am still running into hot and cold spots at about 30-45 mins into the mash. I have 3 layers of reflection wrapping the sides, bottom, and top.

I stir like he'll for about 3 mins before closing everything up for the mash.

Should I be stirring the mash half way through to make sure the temp is even in the MT? I generally do 10 gal batches.

I've always been told to not stir so that the grain bed can settle... I've also read that I should give it a good stir a few times (once or twice) during the mash. I do not intend to stir while spraying (fly),.which makes sense to me.

So, to stir or not to stir. That is the question!

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Old 11-05-2013, 09:38 PM   #2
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Stir Sir!


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Old 11-05-2013, 09:39 PM   #3
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Not saying it's right, but I stir the mash 2-3 times during the mash.
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Old 11-05-2013, 09:41 PM   #4
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I wouldn't worry about the grain not settling if you stir at the half way point, but I have never done it. I stir before I start and that's it. But I wouldn't see why there would be any issues doing it again. Aside from loosing a little heat possibly. Don't know how much you would lose though. But I doubt it would be worth worrying about.
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Old 11-05-2013, 09:41 PM   #5
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Even when fly spraying?
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Old 11-05-2013, 09:42 PM   #6
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I'm gonna brew around the 15th, so I'll give it a go.
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Old 11-05-2013, 09:46 PM   #7
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If you are questioning whether or not to stir DURING the fly sparge the answer is you DO NOT. Stirring defeats the purpose of fly sparging
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Old 11-05-2013, 09:48 PM   #8
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Actually you can (and should) stir the top 2-3" of the mash. As long as you don't disturb the grain bed filter you won't hurt anything.
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Old 11-05-2013, 09:48 PM   #9
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I stir mine 2 or 3 times real good for just 30 seconds or so to make sure I get out all the good stuff just like dipping a tea bag in hot tea to get all that tea from the bag. then let it set for the last 30 minutes maybe without so it settles down . It will settle anyway when you start draining that tun. It has no choice . I drain mine almost dry sometimes and that makes a solid bed and takes a while to get that sparge water into it .
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Old 11-05-2013, 09:50 PM   #10
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On a side note,are you planning on doing a mash out after done mashing? Depending on your mash, if you don't recirculate, which it seems you have a simple mash, some people (me also, but I batch sparge) add enough boiling water to raise the mash temp to around 170F, stopping the enzymes and lowering the viscosity of the wort so that it will flow easier. It may help efficiency with super high gravity wort. You're basically just getting the mash ready to sparge, since you are done converting starches.

I would guess you'd have to stir that, then just let it settle for a few minutes and then sparge?

I never really thought about NOT stirring it, I wouldn't think it would take that long to settle - maybe you're over thinking it?


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