NDS mini channel drain features 6 ft long PVC mini channel drain, inverse flying buttress design bottom flange, patented honeycomb reinforced walls and a UV inhibitor. NDS mini channel drain NDS mini channel drain acts as a perimeter drain, quickly removing water from hardscapes and directing it away from building structures and is ideal for residential or non-residential applications that anticipate moderate amounts of drainage water a low-cost alternative to Spee-D channel, excellent for light duty applications including pools, patios, spas and tennis courts. Mini channel couplings must be used to connect to mini channel fittings