my worst home repair nightmare has happened, a slab leak. at least it's a hot water leak and there's no water damage and the insurance doesn't want to pay. closing the cold water shutoff valve to the water heater has stopped it temporarily. I can't afford a plumber and will attempt to fix it myself. walking into the house from the garage on the right in the house there is a wall. on the other side of the wall there is a full bath. in the bathroom against the wall there is a sink and vanity. the floor facing the vanity along the front edge is warm as is the floor on the other side of the wall along the wall. apparently the water leak is somewhere under the slab in this vicinity. my first question is would anyone have an idea of the most likely spot to break open the slab to access the leaking hot water pipe? now when I find it it will need to be silver soldered. will the bernzomatic propane be able to melt the silver solder or will I have to get the map gas. will a stethoscope aid in finding the exact location of the leak? thanks for any advice