Mark P Posted March 31, 2021 Report Posted March 31, 2021 Home built in 1970. I found grey PVC under a toilet and running up to the roof vent. The only markings I see are "Carlon" "Vylon" "PVC". Now I know grey pipe is electrical conduit; however, was there ever a time we Carlon made DWV pipe? I've searched the internet and cannot find much. Any information is appreciated.
Chad Fabry Posted March 31, 2021 Report Posted March 31, 2021 I'm not sure regarding your question, but PVC is PVC and the fittings are clearly DWV. It wouldn't merit a mention in my report. 1
Bill Kibbel Posted March 31, 2021 Report Posted March 31, 2021 Some carbon is added for additional UV resistance. Much of the gray PVC I've seen used as DWV is schedule 80. You can drive a truck over it.
Mark P Posted March 31, 2021 Author Report Posted March 31, 2021 I just found this, which I found interesting. Schedule 40 PVC vs Schedule 80 PVC - What's the Difference? (pvcfittingsonline.com) 1
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