Diagnose and repair the hardest residential work: concealed leaks, slab and wall leaks, recurring drain stoppages, failed tub/shower valves, obsolete and hard-to-source fixtures. Work with the warehouse to keep the 196-item residential truck stock list right, so the common parts (fill valves, flappers, cartridges, wax rings, angle stops, disposals) are never the reason for a return trip.