4" Pop Up Emitter that comes with an Elbow & Adapter.
The Pop Up Emitter is used to disperse water away from a building structure, and to stop landscape erosion.
The design of this product allows the Pop Up Emitter to open with a small amount of pressure. It will close during dry weather so that debris and animals will not be able to enter the drainpipes. The pressure of water coursing through the drainpipe opens the Pop Up Emitter; it will close as the water flow decreases.