Add an outlet to the end of the Dura Slope™ Channel Drain to connect to 4" sewer & drain pipe with the National Diversified Sales Dura Slope DS-227 Gray Channel Drain End Outlet, Pack of 6. Component is easy to cut to desired Dura Slope channel drain height by using guide marks as reference. To install, knock out end to create the outlet, cut off male side tabs, and secure to male end of the channel and secure with screws at indication points. Keep knockout intact to use as an end cap. Made of high-density polyethylene (HDPE) containing UV inhibitors. Channel drains, also known as trench drains, are long, narrow drains used for surface drainage of hardscapes. Channel drains collect and convey water to drain pipes, which carry the water downstream to discharge with a pop-up emitter, or to percolate into the ground with a dry well or infiltration trench. NDS channel and trench drains are engineered for durability, drainage, and performance.