re: Slab leak detection - plumber recommendation?

They can try to energize the copper line then trace that signal through concrete or use an acoustic pickup to ear muff to listen through concrete. My copper line from my main was connected to a PVC fitting under the concrete on my front porch. Copper to PVC cracked and had to ID the copper termination via energizing it. Had to break concrete, find broken fitting, then replace. I had a plumber ID the fitting transition location then I did the rest. I couldn’t believe that the builder designed my home water entry transition under slab. That should’ve gone strait to an outside hose bib closest to my main. The transition fittings are normally the weak point so best to not have that under slab if possible.