"Timothy Murphy" wrote in message
...
Mike wrote:

If it's plastic you can inject a strong r.f. signal into the water and
search it out with a directional receiver.

I'm afraid the pipe is plastic.
Is your method real?
How do you "inject a strong r.f. signal into the water"?

The water is the conductor, not the plastic. Best method is using magnetic
resonance.

And yes - it's for real.