Due to a possible slab leak in the unit, the owner contacted us. The building’s water supply was turned off. We carried out leak detection and water line tracing operations. The leak detection rate was highest near unit #113’s vanity. To expose the hot main tee, the area was jackhammered and dug up—the riser of a 3/4′′ copper branch leaks. A 3/4-inch copper branch was cut and capped. The water was then turned back on to check for leaks and proper operation.