I helped find a pvc pipe for some guy. He said he had a diviner come out, but the diviner had it going off in a direction he knew it didn’t go.
There is a scientific basis for using hand-held coat hangars to finding metal utilities, but not PVC. I asked the guy how the diviner did it. I guess the diviner had his witching stick, and then had a vial attached to the end with string. Then - you just fill the vial up with whatever you’re trying to find. In this case - pvc shavings! I didn’t laugh too hard in case my client actually believed in that crap.
I’ve found pvc pipe with water flowing through it using the hand-held coat hangers.
I have about a 99% success record in finding lines. Once I was diverted to what we were sure was a wrong direction, but the hangers insisted. We dug up the spot and found not our current lines, but a very old line that had been abandoned decades earlier. It had a slight amount of water in it.