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Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > New Mash Tun
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Old 01-10-2013, 03:08 AM   #11
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Fun build!


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Old 01-10-2013, 11:07 PM   #12
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nice! I have never seen it done this way before. Seems much more simple then the other DIY.


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Old 01-10-2013, 11:09 PM   #13
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How is that PVC going to play into things at 150 degrees? I don't think PVC is food grade. Is it?
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Old 01-10-2013, 11:30 PM   #14
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Quote:
Originally Posted by jakenbacon View Post
How is that PVC going to play into things at 150 degrees? I don't think PVC is food grade. Is it?
Yeah, you ideally want to use CPVC at a minimum. Brass or copper is better. O-rings should probably be silicon too. PVC is food grade but CPVC is rated for higher temps.
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Old 01-11-2013, 12:59 AM   #15
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Quote:
Originally Posted by Spintab

Yeah, you ideally want to use CPVC at a minimum. Brass or copper is better. O-rings should probably be silicon too. PVC is food grade but CPVC is rated for higher temps.
Good to know! I've been wanting to go the PVC route to save $ but was unsure... Not anymore, thanks!
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Old 01-11-2013, 08:02 AM   #16
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Yeah. PVC is a no go at these temps. I used CPVC, but am changing it to copper.
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Old 01-11-2013, 03:19 PM   #17
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CPVC is fine but not regular PVC. Oh, don't put any orings or seals on the outside of the cooler. The last thing you want is to fill the wall cavity with mash liquor if your inner seal fails. In fact, I recommend drilling a 1/8" weep hole in the bottom corner of the outside wall just under the valve so it tattletales a leak right away.
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Old 01-11-2013, 03:38 PM   #18
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I recommend drilling a 1/8" weep hole in the bottom corner of the outside wall just under the valve so it tattletales a leak right away.
That is a great tip!
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Old 01-14-2013, 12:24 AM   #19
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Did some research - although I will change the inside PVC - PVC can go to 140 degrees if under pressure, non presser it can go to 158-170 degrees, for normal thickness. the coupler thickness will go to 200-205 degrees.

But for about $5-10 bucks I will change it as I want to make sure it has no "off flavors"

small price to pay for insurance.
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Old 01-14-2013, 06:28 AM   #20
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Yeah, we're not talking about the structural integrity. It's the leaching that could come with high temps and PVC.


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