Pipe unions and couplings, namely, metal pipe unions and metal pipe couplings; metal tee-pipes; and metal venturi pipes; Diffusers for circulating hot and cold water for use in radiant heating and cooling systems sold as integral components of metal floor panels; Hydronic heating and cooling systems comprised of manifolds, manifold accessories, wet and dry system flooring panels, piping, valves, fittings, gauges, controls, hydronic mechanical panels, pumps, air separators, backflow preventers and expansion tanks for distributed water heating and cooling systems, sold as a unit; Ceiling And Floor Panels Of Metal Incorporating Diffusers For Circulating Hot And Cold Water For Use In Radiant Heating And Cooling; washing machine valves; Devices and accessories for use with liquid and gas plumbing, namely, valves, Y-strainers, fittings, polymeric pipe unions, stops, air purgers, air vents, backflow preventers, screens, drains, bibbs, sillcocks, valve locks, valve stops, valve stem extensions, valve handles, faucets, polymeric pipe couplings, and anti-scald fittings; gas burner bars for commercial and residential use; fluid floats; and evaporative cooler valves; Pipe unions and couplings, namely, non-metal pipe unions and non-metal pipe couplings; flexible plumbing pipes of plastic piping; Plumbing fittings, namely, adapters, ball valves, couplers, gate valves, globe valves, hose bibbs, low pressure valves, stop valves, stop and waste valves, thermoplastic valves; Liquid and gas plumbing devices, namely, valves, Y-strainers, pipe unions, stops, air purgers, air vents, tee-pipes, venturi pipes, backflow preventers, screens, drains, bibs, sillcocks, valve locks, valve stops, valve stern extensions, valve handles, faucets, anti-scald valves, and fitting, namely threaded connectors; gas burner bars for commercial and residential use; washing machine valves; fluid floats for industrial cooling towers, and agricultural water troughs and containers; and evaporative cooler valves; Non-metal pipe couplings; Pipes for use in hydronic heating systems made of polyethylene; Insulated floor panels of foam for circulating hot and cold water in and sold as an integral component of radiant heating and cooling systems; Non-metal pipe fasteners, namely, plastic clip holders and clip rail for securing flexible or rigid pipe and tubing; non-metal pipe collars; Wholesale distributorships featuring plumbing supplies, namely, ball valves, gate, check, low pressure valves and Y-strainers, heating valves, backflow preventers, thermoplastic valves, cast iron valves, butterfly valves, specialty products, wrot copper fittings, cast pressure fittings, bronze pipe fittings and nipples, insert fillings, malleable pipe fittings, black and galvanized pipe nipples, and water service fittings; Training and education, namely, providing workshops, classes, presentations and instruction in the fields of distribution manifolds, mechanical room piping, flooring systems, flooring installation