NDS 550 4.5" x 3' Gray Mini Channel Drain Bottom Outlet, Connects to 2" Drain Fittings Connects to 2" Drain Fittings. The 3 ft. long channel drain features an integrated bottom outlet that connects to 2 in. Sch. 40 pipe fittings. Fits one 3 ft. Mini Channel Drain Grate or three 1 ft. Mini Channel Drain Grates on top. The Mini Channel Drain Bottom Outlet is made of polyvinyl chloride (PVC) treated with UV inhibitors. Mini Channels are part of the NDS Profile Channel series, and ideal for capturing light water flows from pool and spa areas, concrete and paver patios, tennis courts, walkways, and driveways. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.