Non-metallic conduit, tubing, and pipe, namely, smooth wall plastic pipe for drainage applications; corrugated pipe, namely, perforated and non-perforated plastic pipe for drainage applications; non-metal pipe couplings; non-metal pipe couplers for use with plastic pipe; plastic drainage pipes for commercial and residential use along roadways; flexible plastic pipe, not of metal; non-metal fittings and couplings for plastic pipe; plastic corrugated pipe and tubing with smooth interior using an integral gasket and bell coupler for draining systems, storm sewers, and sanitary sewers; flexible non-metal corrugated pipes for drainage and sewage purposes and fittings couplings therefor; polyethylene drainage and irrigation pipe; plastic pipes, tubing, and conduits for drainage purposes, and non-metal couplings therefor and fittings therefor, namely, wyes, tees, elbows, bends, plugs, adapters, and reducers, excluding rubber and polymer hoses for agricultural use; corrugated plastic tubing and fittings therefor; plastic drainage and water management products, namely, smooth walled and corrugated plastic pipe and tubing, fittings, sump wells, distribution boxes, alternator valves, septic and sewage tanks, culverts, drain wells, and plastic tubing; plastic subsurface drainage and water retention and detention chambers and headers; non-metallic conduit, tubing, and pipe, more particularly corrugated plastic pipe with smooth inner wall for drainage applications; plastic corrugated pipe tubing with smooth interior using an integral bell coupler for drainage systems, storm sewers, and sanitary sewers; plastic pipes for sewer, drainage, and low pressure irrigation applications; polyethylene pipe; fittings and related parts to service the polyethylene pipe, namely, lateral tap tee fitting connections and connections to manholes