NDS 421 4" Pop-Up Emitter with SDR35 Elbow

Allows water to be diverted and released to water-safe areas away from structures, erosion-prone landscapes and poor drainage areas. Permits water captured by grates, catch basins, channel drains, Flo-Well, downspouts and roof gutter systems to flow through the drainage pipe and away from structural foundations to safe or useful areas. For example, water can be routed from a low area next to a foundation to a water safe area such as a curbside drainage system. The emitter is opened by the hydrostatic pressure of water flowing through the drain pipe. As flow diminishes the emitter closes again. The special patented design allows the emitter to open with a negligible amount of pressure. Since the emitter is closed during dry weather, debris and rodents cannot enter the drain pipes. Specifications: Color: Green