11 Plumbing, Heating, Cooling and Water Supply Equipment-Namely, Piping, Plastic and Copper Tubes and Couplings for Plumbing Purposes, Plastic Coated Metal Tubes and Couplings for Plumbing Purposes, Shower Heads, Drain Pipes, Waste Water Collecting Pipes and Pipe Connections, Traps for Sinks and Wash Basins, Tubs, Water Mixing Valves, Shut-Off Valves, Manual Cocks and Faucets