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Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > 70 quart Coleman Extreme Mash Tun w/ CPVC Manifold
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Old 02-21-2013, 06:06 AM   #11
h4mmy86
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They function as spacers. Keeping a gap between the sides of the cooler and the manifold helps prevent channeling along the outside of the grain bed.


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Old 02-21-2013, 06:07 AM   #12
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Ahhh, gotcha... Thanks!


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Old 02-21-2013, 07:52 AM   #13
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More slots! Don't get lazy now!
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Old 02-21-2013, 03:50 PM   #14
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Ya think I need more slots?

They're spaced one inch apart, which I read was ideal, but when it was all said and done I too thought it looked like I could use some more slots.

....oh well, doesn't matter as I broke my cutting disk yesterday on another project.

What spacing would you recommend ?
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Old 02-21-2013, 10:48 PM   #15
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I'm not trying to argue with anyone's definition of "ideal" -- I went with 1/4 inch slot spacing on the CPVC manifold in me cube and I'm very happy with the results: 89% efficiency on most beers and I've never had a stuck sparge. I had to cut mine with a hacksaw as I made the manifold years before I bought my angle grinder!
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Old 02-22-2013, 01:44 AM   #16
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I don't mean to argue that the method I followed is ideal, that's merely the opinion I read. I really don't know.

Upon further research it seems that there is much debate and no definite answer. It seems anything from .25" up to 1" is acceptable.

I can argue logic for both ways but really have no prior manifold experience so I really can't say for sure.

I'm gonna try it as it is and maybe I'll cut more slots down the line.

...seems like someone should have already done this experiment.
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Old 02-22-2013, 06:48 AM   #17
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No arguments here either friend! I really don't know either!
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Old 02-22-2013, 01:57 PM   #18
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Quote:
Originally Posted by h4mmy86 View Post
I don't mean to argue that the method I followed is ideal, that's merely the opinion I read. I really don't know.

Upon further research it seems that there is much debate and no definite answer. It seems anything from .25" up to 1" is acceptable.

I can argue logic for both ways but really have no prior manifold experience so I really can't say for sure.

I'm gonna try it as it is and maybe I'll cut more slots down the line.

...seems like someone should have already done this experiment.
I think your manifold looks great. I will be interested to see how it performs. When I made my manifold, years ago out of 1/2" copper pipe, I used 0.5" spacing for my slots. I usually get 75% efficiency. I like the 70 qt cooler since I usually brew ten gallon batches. Works well for small beers like ordinary bitters up to dopplebocks.
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Old 02-23-2013, 02:40 AM   #19
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Any chance you could provide some specifics such as measurements and parts list for the manifold? Just picked up one of the coolers tonight. Thanks!
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Old 02-24-2013, 03:51 PM   #20
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I really just threw this together as I went along, I don't have any good notes or anything like that to share. Sorry


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