Hi, Just upgraded my dust collector. Picked up a used one and the seller included all his piping. He was using 4 inch thin wall PVC drain pipe. He had it grounded because it produced static electricity. He had wrapped copper wire around it. I need to do this when I install it so how do I go about doing this? Where do I terminate the grounding our shop is all metal ( United Steel Building type) My original set up was the 4 inch heavy plastic dust collector hose the clear type. Thanks, Jim