I was trying to prevent static but I probably doesn’t help. Also try to keep metal pole from affecting the mag field around antenna. Probable doesn’t help either. If I already had metal I would have probably used it.
Actually although PVC pipe very poor conductor, it’s a great holder of static charge. More than metal actually. Just ask woodworkers who use PVC for their central dust collection system :).
I use PVC for masts as well, for the cost and ease of use, and took care to ground the pipes.