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Old 05-05-2010, 03:30 AM   #1
thenatibrewer
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Default mash tun keggle question

OK here it is. i would like to hear peoples opinions about what type of manifold people use for a keg that is converted to a mash tun. i have one that is very well insulated, but i have been working on manifold designs. i used to use a 10 gallon cooler from home depot. i had a false bottom in it. it seemed to work well but i wanted to use a keg. i just built a 3 tier sculpture. currently i put a 3/4" braided line in the bottom of my mash tun. my concern is the amount of space between the ball valve and the bottom of the keg. using a piece of 1/2 copper and some 45s i have the braided line lining on the bottom of the keg now. i guess the question is will this create a siphon so all or at least most of the wort would be drained? i also fly sparge if that matters. all opinions would be appreciated!!

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Old 05-05-2010, 03:47 AM   #2
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Check this out http://www.homebrewtalk.com/f51/sanke-mlt-stainless-braid-56183/

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Old 05-05-2010, 12:12 PM   #3
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bobby,
i checked that thread out. that is what inspired me to do what i did. one difference is that i stopped the copper where your second 90 is.(only mine are 45s) then i attached the braided line to that.
i have a few questions, will it actually siphon and what kind of efficiency can i expect? any information will be appreciated, plus some pics of peoples setups would be cool too.

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Old 05-05-2010, 12:47 PM   #4
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I use a SS tube curved to the bottom of the keg. It passes through a false bottom. Yes it does create a siphon effect, even when using gravity and leaves less then 1/2 cup of liquid behind.

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Old 05-05-2010, 01:06 PM   #5
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I leave more wort behind with a false bottom than I did with that braid setup. It's very good at separating and it will definitely siphon.

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Old 05-05-2010, 06:37 PM   #6
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So, if you had it to do over again, with your current natural gas setup, would you have the false bottom or that tube design?

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Old 05-05-2010, 07:37 PM   #7
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No question about it, the false bottom is required (in my opinion) if you want to direct fire the tun. I mean, I know you can stir your mash feverishly if you have thick mash touching the heating surface, but I think back to some RIS and barleywine batches where mash was overflowing the tun and think I'd definitely would have scorched bad.

If I was using the keg as a passive MLT with heating done in a RIMS tube or HERMS coil, I'd go with either the braid over tube design or a smaller false bottom with a bottom drain port.

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Old 05-05-2010, 09:00 PM   #8
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so i tested out the 1/2" copper pipe leading to the bottom of the keg. it siphoned all but just a very small amount of water out of the keg it was awesome. i am excited about brewing this weekend to test it out.
on my set up i am not using direct fire. i am going to preheat my tun then add grain and the rest of the water to reach the proper temp. i cannot wait.

by the way how to i add some pictures...i have some i want everyone to take a look at. thanks for all info so far.

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