Pop-up drainage emitters from NDS provide an outlet for water that’s captured by grates, catch basins, channel drains, and gutters, and directed away from structural foundations through drainage pipe. The emitter is designed to open under minimal hydrostatic pressure from water in upstream drainage pipes and close as flow diminishes. During dry weather, it’s closed, blending discreetly into the surrounding landscape and keeping debris and rodents from entering drain pipes. Pricing varies by size; a 3-inch pop-up emitter with elbow costs about $22 online. ndspro.com
