| It's gonna work like this Jack. First follow Bals advice about shutting off the water at the meter. There should be companies that advertise "Leak Detraction" in the yellow pages. They will come in with a sensitive listening device and pin point the leak under the slab. In the US they jackhammer up the slab, dig out the dirt, bag it and bare the leak so the plumber can drain the system down and repair it. Do not delay, have this looked at as soon as possible. Good luck, Tom |