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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Can a kettle screen cause low efficiency?
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Old 07-07-2012, 09:54 PM   #1
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Default Can a kettle screen cause low efficiency?

I am not very DIY capable so instead of a manifold or stainless hose I bought the kettle screen/bazooka tube. Would that have anything to do with my low efficiency number or is it just my poor technique as I gain knowledge on how to improve my process? A link to the tube I bought. I got it at AHS when I started.
(http://www.ebay.com/itm/SS-Bazooka-S...#ht_2224wt_905).

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Old 07-07-2012, 10:02 PM   #2
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Just how low an efficiency are you getting? You should be able to get a pretty decent efficiency using the screen. A false bottom might improve your efficiency, but there is no reason you shouldn't be able to get 70%+ efficiency with just the screen. It is more likely a process or crush issue if it is very poor.

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Old 07-07-2012, 10:10 PM   #3
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I have done 6 AG batches and every one has been between 50-55%. My batch today I accounted for the low efficiency and bought a bigger grain bill to hit my OG. I have bought grains from AHS, NB, and my LHBS. I just bought a grain mill so my next batch I will crush, but I think I need to tighten up my process in the Mash and Fly sparge to improve my efficiency.

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Old 07-07-2012, 10:18 PM   #4
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Fly sparging with a bazooka tube is going to be inefficient. To fly sparge effectively, you need a false bottom or manifold that covers the entire base of the MLT otherwise you will get channeling.

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Old 07-07-2012, 10:19 PM   #5
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Quote:
Originally Posted by Rau71
I have done 6 AG batches and every one has been between 50-55%. My batch today I accounted for the low efficiency and bought a bigger grain bill to hit my OG. I have bought grains from AHS, NB, and my LHBS. I just bought a grain mill so my next batch I will crush, but I think I need to tighten up my process in the Mash and Fly sparge to improve my efficiency.
+1 to milling your own grain! Also, with fly sparging it should take at least an hour and you need to be sure there is always a little water sitting over the grain bed as you go. Mash temps are also important so be sure your thermometer is calibrated properly
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Old 07-07-2012, 10:28 PM   #6
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Quote:
Originally Posted by duboman

+1 to milling your own grain!
+2 milling your own grain, run your hands through it to make sure its all crushed
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Old 07-07-2012, 10:33 PM   #7
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Is it possible to get a false bottom made for a rectangle cooler? I have only seen circular ones. That being said would it be worth it to get a circular Mash tun and a false bottom? I am not confident in my ability to make a manifold for my Rectangular mash tun.

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Old 07-07-2012, 10:48 PM   #8
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Quote:
Originally Posted by Rau71 View Post
Is it possible to get a false bottom made for a rectangle cooler? I have only seen circular ones. That being said would it be worth it to get a circular Mash tun and a false bottom? I am not confident in my ability to make a manifold for my Rectangular mash tun.
I don't think you can get false bottoms for a rectangular cooler, but you can certainly batch sparge which should give you much better efficiency.

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Old 07-07-2012, 11:52 PM   #9
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"Can a kettle screen cause low efficiency?"

No


Something else is wrong. I have a 4" stainless braid and I consistently get 84-85%. Now that you have a mill there is a saying, that while not big on this site, that has been around awhile. Crush til your scared

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Old 07-07-2012, 11:59 PM   #10
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Batch sparge with that setup and your efficiency should go up.

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