Abstract: The present invention is a reversed wastewater overflow prevention system that provides alternate wastewater routing in case of main sewer blockage as well as home detection and alert system of wastewater drainage problem. Its main components include a wastewater overflow conduit outfitted with an overflow water sensor that is connected to an alarm, and one or more wastewater backflow preventers. The system application is both in new construction, residential and commercial, as well as in retrofitting existing systems. When all the components are combined the system provides both an alternate route for reversed wastewater to exit the building wastewater drainage system into an overflow leaching field and an alert system that provides warning about a drainage system problem.