(08-22-2020, 07:19 AM)jcredding Wrote: Haven’t seen a good PVC static electric shock discussion in a few years - they were always fun to watch.

Personal experience - I had 6” S&D pvc for about 10 years in my prior shop before going to metal ducting in my new shop.  Was there static electricity?  Yes.  I knew because dust would stick to it and it would raise the hairs on my arms if I got very close (within an inch or so).  Was it grounded?  No.  Did I ever get anything more than the hairs raised on my arms? No.  I was more focused on dust collecting on the water heater and somehow have the pilot light ignite it than I was the little static that built up on the plastic pipe (and nothing every happened with that either).

In the end, if you’re concerned, then ground it.  It’s a few screws and some wire.  But I’ve never heard of a fire or any meaningful zap from PVC static build up.