NDS 4-in dia Outlet

Diverts and releases drainage water away from structures, erosion-prone landscapes and poor drainage areas. Fits 4-in sewer and drain pipe and fittings, corrugated pipe and triple wall pipe. The pop-up emitter can be used with any drainage system to divert water away from the problem area. The special patented design allows the emitter to open with a negligible amount of pressure. Since the emitter is closed during dry weather, debris and rodents cannot enter the drain pipes. The pop-up emitter is opened by the hydrostatic pressure of water flowing through the drain pipe and as the flow diminishes the emitter closes. Prevents damage from lawnmowers. NDS has a full line of drainage products, fittings and accessories available. May need to check local building codes.