NDS 420C Pop-Up Drainage Emitter, 3-Inch and 4-Inch
This 4-Inch pop up emitter allows water to be diverted and released to water-safe areas away from structures, erosion-prone landscapes and poor drainage areas. It also allows 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 such as a curbside drainage system. Opens by hydrostatic pressure of water flowing through the drain pipe, as flow diminishes the emitter closes.