Customers waste and overflow is leaking down into units ceiling below them. Recommended replacement of waste and overflow as well as P trap in order to remove clog as well as fixing the leak Performed repair to waste over flow by opening ceiling of unit A in order to gain access to drains for the bathtub of unit C. Removed old waste and overflow as well as galvanized P trap. Installed new P trap and waste and overflow. Ran water for several minutes and everything was draining properly with no leaks