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I read Rod Cole's article "PVC pipe dangers debunked" in FWW#153. He says useing 4 inch plastic pipe on a dust collection system of 3 hp or less does not pose any risk of explosion. I'm thinking of using 6 inch plastic sewer and drain pipe for the main along with an Onieda 2 hp Dust Gorilla. I would wrap copper wire around it and ground it.
My question is, does having a ground around the outside of the pipe eliminate or reduce the static charge inside the pipe to the point where it's safe? Has anybody used grounded 6 inch plastic pipe? I wuold appreciate any advice. Thanks.