NDS 421 4-inch Pop-Up Springloaded Drainage Emitter with Elbow

Features:

• Spring-loaded cap pops up as high as 1 in. once water pressure builds and closes automatically as flow diminishes
• When not in use, cap stays closed to keep debris and rodents out of the drain
• Small weep hole in elbow drains residual water from the pipe to prevent stagnation or freezing in cold weather
• Flange design prevents grass from growing over the cover

Applications:

• Provides a downstream point of release for water collected upstream in a drainage system
• Install at the lowest point in the drainage system, away from buildings, landscapes, and poor drainage areas
• Works with a complete drainage system to release collected stormwater runoff and standing water