The Pop-Up Drainage Emitter discharges stormwater captured upstream by catch basins, channel drains, and other drainage solutions and carried downstream with connected drain pipe. The spring-loaded emitter cap pops up to 1 in. high to release water when pressure builds, disperses water at up to 56 GPM, then automatically retracts once flow diminishes. Cap stays closed when not in use to prevent debris and rodents from getting into the drainage system. The Pop-Up Emitter connects to 3 in. & 4 in. sewer and drain fittings which connect to sewer and drain pipe and triple-wall pipe. Cap and cover made of high-density polyethylene (HDPE). Pop-Up Drainage Emitters are part of a complete drainage system used for stormwater management. They work with pipes, catch basin drains, channel drains, trench drains, and drain grates that filter, capture, and convey excess water to drain pipes; the pipes carry the water downstream to discharge with a Pop-Up Emitter, or to percolate into the ground with a dry well or infiltration trench. Get scalable stormwater management solutions for residential, commercial, and industrial applications at NDS. Free tools and calculators, store locator, and support available on the NDS website and NDS Stormwater Drainage mobile app. Whether you’re a homeowner, contractor, specifier, or distributor, we’re here to help make your project a success