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Old 09-05-2007, 03:11 PM   #1
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Default Manifold: PVC VS Copper

I've been searching the forum and have found a couple threads that touch on this subject but haven't really found a difinitive answer one way or the other. I want to build a cheap and easy manifold for my Mashtun. My question is: Will PVC hold up to mashing temps over time? Is it safe? Or should I just avoid the possible hassles and use copper? Any input would be great! Thanks!

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Old 09-05-2007, 03:24 PM   #2
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I wouldn't use PVC (will not hold up to temps), but CPVC is fine. I use copper but it seems to be a 'whichever you prefer' kind of decision as either will work.

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Old 09-05-2007, 03:26 PM   #3
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If it were me I would use the copper to make a manifold, CPVC might hold up, but why chance it when you KNOW copper will. Yes it is an extra expense and not as easy to work with (although it is pretty easy), but it is the right material for the job and I am always one for using the right thing for any given project, especially when we are talking about making beer.

If you aren't wedded to the manifold design, a simpler way to go is the SS braid for false bottom (this is what I use), but some guys have reported that they have channeling issues during the sparge (from what I gather this is more of a problem for those who batch sparge) but I have not experienced this myself.

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Old 09-05-2007, 03:32 PM   #4
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I use a stainless braid inside a 10 gallon Home Depot water cooler. I batch sparge with it and get 80%+ efficiency and it makes great beer. Simple, easy, & highly recommended.

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Old 09-05-2007, 04:55 PM   #5
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I second the braid suggestion. Even if you decide to replace it once in a while, you're out a whole $6.

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Old 09-05-2007, 04:59 PM   #6
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get a really long braid, and some copper fittings...make a circular manifold...supposed to be a little nicer than a straight braid.
Palmer's book has some info on exact parts and why you want it fairly equidistant from the outside edge of teh mash tun.

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Old 09-05-2007, 05:01 PM   #7
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Regular PVC is definately out, it'll leech out chemicals at or close to mashing temps. I use the braid, it's easy but I must say my efficiency sucks (I blame the crush, though).

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Old 09-05-2007, 05:27 PM   #8
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Quote:
Originally Posted by the_bird
Regular PVC is definately out, it'll leech out chemicals at or close to mashing temps. I use the braid, it's easy but I must say my efficiency sucks (I blame the crush, though).
I hear ya there. We need to get some mills made up and go in on some bulk grain!
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Old 09-05-2007, 05:33 PM   #9
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Couple of thoughts:

If you do only batch sparging, you can use a super short piece of braid, which will allow your runoff to clear quicker (less surface area)

I thought I wanted super clear runoff, so if I use a manifold, I'd never get there. I don't use either, I use a fine s/s screen.

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Old 09-05-2007, 05:44 PM   #10
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Thanks for all the replies, I did originally mean CPVC, just in a hurry typing. I suppose the alternatives are worth the extra effort and cost. I just tend to get a
little lazy sometimes!

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