Need help figuring out how grain is getting under my MLT false bottom - Home Brew Forums
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Old 10-18-2011, 04:00 AM   #1
worldzfree
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I have about three brews done on my new Brutus 10 styled system I built and each time I have been having issues during the recirculation and fly sparge getting grains under the false bottom and coming out through the dip tube. I am looking for some help figuring out what to try to prevent this from happening.

Here are the details of the system. Single tier Brutus 10 style system. Using kegs I converted as the vessels. The false bottom is a Jaybird folding false bottom (without the handle or supports underneath). The dip tube end has been cut to fit about an inch off the bottom of the keggle. I use a monster mill MM2-2.0 mill with a gap I have set at .043." I have made a couple 10 gallon batches and one five gallon batch all with the same results of getting grains coming through.

It's bugging the crap out of me that I get a descent amount of particulates getting pumped over to the BK. The goal is a minute level. Any idears?



 
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Old 10-18-2011, 07:17 AM   #2
benbradford
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take something like a piece of string or a small straw or toothpick or something and make sure it is seated well all the way around the edges, as that is where mine tend to come throught if I don't seat it well. As a safety measure, I use a plastic scrubby under dip tube to make sure nothing comes in to clog the lines...


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Old 10-26-2011, 12:00 AM   #3
worldzfree
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thanks for the advice. so is that most likely it? something is getting in on the side?

 
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Old 10-26-2011, 01:16 AM   #4
benbradford
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unless the grind is too small for the holes in the false bottom...
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Old 10-26-2011, 01:20 AM   #5
shutupjojo
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I use a stainless scrubbie under my dip tube and it works great. Keeps all the little bits out.

 
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Old 10-26-2011, 04:15 PM   #6
OneHoppyGuy
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Broken record... spendy but the best I've used is the Pico style false bottom

 
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Old 02-12-2012, 03:39 PM   #7
worldzfree
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Well I am back to this thread I started. I am investigating a few different options now. First off, how does that PICO false bottom work in a traditional welded coupler/diptube configuration? Does it sit on top of all those things?

Here is what I have tried and I still get a decent amount of particulates coming through.

-Increased my gap on my mill to up to .045
-Rice hulls mixed with the mash
-My false bottom is a hinged false bottom and I have held it in place with a SS hose clamp on the dip tube holding it down

I am starting to wonder if I am creating a vacuum with my Little Giant pump and the bottom is pulling down in the middle and the edges are lifting on the sides letting grain through.

I am thinking of trying the following.

-Try a PICO false bottom
-Try a Sabco false bottom that has legs under it to keep it from bending
-Try a smaller (mine is currently 15") false bottom that is a solid piece instead of a folding

Would love to figure this out. It's sorta driving me mad these days.

 
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Old 02-12-2012, 03:58 PM   #8
wailingguitar
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If you think you might be pulling vacuum, try making a grant. Use it for a brew or two and see the results. You may decide you like having it anyway regardless of whether or not it solves the problem.
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Old 02-12-2012, 05:00 PM   #9
BargainFittings
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It might just be bowing inward a bit like you think.

What sort of support is in the middle? Maybe use a couple of supports under each side of the hinge to be sure it stays flat.

 
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Old 02-13-2012, 01:05 AM   #10
JRems
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How much grain is getting through? I have a jaybird false bottom 12" ( non hinged) I used a hose clamp on the dip tube to make sure the false bottom sits tight against the bottom. I don't direct fire so I didn't need a full 15" bottom. It's a herms and recirculated and only a tiny bit of very fine grain was below the false bottom when I cleaned it out. It must be coming through the edge. Do you have a dent in the keg near the edge? It might not sit flat and grain might get through.



 
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