NDS 8473 Gray Plastic Micro Channel Drain End Plug to close either end of the Micro Channel Drain, forcing water to flow toward the open outlet. Works as part of the Micro Channel Drain system to collect and direct light flows of surface water from pool and spa areas, concrete and paver patios, and walkways to drain pipe. The Micro Channel Drain End Plug is made of polyvinyl chloride (PVC) treated with UV inhibitors. Micro Channels are part of the NDS Profile Channel series. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.