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Old 10-18-2008, 03:02 AM   #1
treesmcgee
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My buddy recently just built a MLT out of PVC and I read online that the procedure to make a MLT called for CPVC, is there a problem with using PVC over CPVC or is it just a performance aspect or what?

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Old 10-18-2008, 03:31 AM   #2
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He needs to use CPVC becasue PVC isn't ment for hot water while CPVC is
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Old 10-18-2008, 03:37 AM   #3
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Originally Posted by fat x nub View Post
He needs to use CPVC becasue PVC isn't ment for hot water while CPVC is
+1. PVC will leech chemicals at mash temperatures.

 
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Old 10-18-2008, 05:52 AM   #4
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CPVC would be the best as it is intended for high temperature usage. But as the manifold is not going to be under pressure, your buddy will be fine. And there isn't likely to be anything leeched from the PVC due to the temperatures involved in mashing.

 
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Old 10-18-2008, 06:02 AM   #5
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You want the CPVC usually a cream color. PVC will leach Cl gas at high temps. Its a lousy ass plastic in general. I would go with copper if I were him.
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Old 10-18-2008, 04:00 PM   #6
treesmcgee
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We'll we've got some conflicting results here, some saying PVC will leech toxic chemicals into his brew, others saying that hes alright! Is this a serious serious problem, or can he hold off for a couple batches?


Edit: And, he mashed a batch 2 days ago and has it fermenting, should we discard this batch because of chemical "leeching" as you guys are stating, or is it okay for us to drink when its done. I'd really like to keep this batch we did because it looked and smelled really good going into the fermenter, but I mean... come on.. chemicals
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Old 10-18-2008, 04:10 PM   #7
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Quote:
Originally Posted by treesmcgee View Post
We'll we've got some conflicting results here, some saying PVC will leech toxic chemicals into his brew, others saying that hes alright! Is this a serious serious problem, or can he hold off for a couple batches?
This is PVC
Maximum Temperature: 158F 70C
Minimum Temperature: -13F -25C
Autoclavable: No
Melting Point: 176F 80C
Tensile Strength: 6,500 psi


CPVC is
Max. Operating Temp. (C) 90 (194*F)
Melting Temp. Range (C) 220 - 240 (428*F)

CPVC has a softening point of 200*F
So as you see the PVC will start melting at mash temps
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Old 10-18-2008, 04:20 PM   #8
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Thanks for the info FSR. We'll definitely be building a new one, and more than likely with copper tubing, or at least CPVC. Also, as I edited into my last post, we already brewed a batch using this PVC manifold and I wanna know if it is safe to drink. Thirdly, we've got some rubber washers on the inside, to seal the hole we drilled to connect to manifold. I guess my question is if those washers are safe.
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Old 10-18-2008, 06:09 PM   #9
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I used PVC when I didn't know better and my manifold lasted for two batches before it was too warped to work anymore. I didn't have any problems with leeching, but obviously a manifold that lasts is what you want.
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Old 10-18-2008, 07:10 PM   #10
treesmcgee
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Yeah I hear that, we decided to make it out of copper. I will have to post pictures of it to ask the question how to seal the hole we drilled. Its a 3/4 inch hole we drilled with a 3/4 inch boring bit, and I was wondering what type of sealant or washers or what not I could use to seal this hole so no wort seeps into the lining of my cooler.
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"Roll out the barrel, we'll have a barrel of fun, we'll drink on the barrel, until the barrels' done, and when the barrels' done, we'll roll another one, and we'll drink, drink, drink, until the night is done" - Keg Season Song

 
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