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CORNDAWG 09-30-2013 09:56 PM

PVC risers and valves for UDS
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I have a friend that wants to build a UDS like mine, except he wants to use PVC risers instead of black pipe and PVC valves instead of brass. Does anyone have any experience with using PVC? I have seen images and it looks like they use black pipe 90 degree elbow coming out of the drum and use PVC from there upward. Any issues with heat/melting or transfer of fumes due to heat?

Muscrat 09-30-2013 10:01 PM

I have built 2 of the were the valve was PVC with no issues but the riser was steel. BUT I can't imagine there being an issue as long as the 90 was steel!

Fwismoker 09-30-2013 10:04 PM

Yea there's no issue as long as the 90 is steel like muscrat said. I have steel to PVC fittings on my mini when i'm running the IQ.

retired trucker 09-30-2013 11:24 PM

I had a PVC fitting in the hole for my Maverick probes about 4 inches down from the rim of the barrel. It burned out and fell out after less than 6 months of use. The pvc nut was brittle and had cracked due to the heat. It just fell off one day when I was inserting the probes through it for a cook. I now just wrap the probes in foil and plug the hole while cooking. Works better that way.

I think the heat will be too great for direct input into the sides of the barrel, and that a steel pipe elbow would be better, and then use the PVC pipe for the standpipe. I also tried a 2 inch PVC section for my exhaust coming out of the 2 inch bung hole, and it became brittle in a short time. I replaced it with a steel nipple and all was good from then on.


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