Direct waste flow one-way through septic tank leach fields with the ABS 4 in. Diverter Valve. The diverter valve is lightweight, making it easier to install, and conveys water through the valve outlets. The diverter valve stem controls flow to up to three septic tank leach fields. Unwanted outlets can be sealed with caps. This easy-to-use valve connects up to four 4 in. sewer and drain pipes in a pressurized system and prevents backflow. Durable diverter valve is made of ABS. Valve won't shatter, bend, rust, or corrode.