Pipes made of rubber; flexible hoses, not of metal; irrigation hoses; hose pipes made of plastic for irrigation; hoses made of rubber for irrigation; non-metallic adjustable hoses; rubber tubes for irrigation, plastic tubes for irrigation, clay tubes for irrigation; junctions, not of metal, for pipes; hose fittings, not of metal; pipe fittings in the nature of junctions, not of metal, structural parts of rigid non-metal water pipes; non-metal gaskets for irrigation; non-metal pipe couplings and joints; pipe gaskets; non- metallic couplings for pipes; pipe spacers, not of metal, namely, rings of rubber for use as pipe connection seals; pipe joint sealant; collars of rubber for fastening pipes; pipe extensions, not of metal; articles of rubber for use in connecting pipes, namely, rings of rubber for use as pipe connection seals; sealing rings for hose fittings, not of metal; rings of rubber for use as pipe connection seals; watertight rings for plumbing pipes; non-metallic couplings for tubes; non-metal seals for hose pipe connections; pipe insulation; insulation jackets for pipes; hose bandages, namely, polyolefin film with a rubber adhesive used to protect the surface of a hose; flexible pipes, tubes, hoses, and fittings therefor, including valves, not of metal; valves of rubber or vulcanized fiber; valves of synthetic rubber; valve packing sets, not of metal comprised of graphite packing for valves, asbestos packing for valves; pipe linings, not of metal, namely, interior linings made of non-metal fabric and sealant for the repair of electrical, telecommunication and natural gas utility pipes