Is there a way to locate an underground PVC water line

Is there a way to locate an underground PVC water line

It takes a plastic pipe locator to find PVC and poly irrigation tubing, a device that is one step up from water witching. An impulse generator is attached on the side of the line that sends an intense sound in the water and down the line where it is picked up by a ground microphone and headset. The overall system works better if the water is running so it carries the sound down the line.
Let your fingers do the walking and call around to some plumbing repair companies. Good luck, Tom