17
Flexible pipes, tubes, hoses, and fittings therefor, including valves, non-metallic; Seals (Non-metallic -) for pipes; Waterproof packings; Grommets made of vulcanized fibre; Grommets made of synthetic rubber; Insulated pipe supports; Flexible plastic conduits for plumbing use; Valve packing sets; Clack valves of rubber; Valves of vulcanised fibre; Valves of synthetic rubber; Valves of india-rubber or vulcanized fiber [fibre]; Thermal insulation jackets for valves; Flexible tubes, not of metal; Pipe joint compound; Casings of rubber for tubes; Pipe insulation; Pipe sealing compositions; Glands for pipes; Non-metallic insulated pipes; Identification sleeves of plastics for tubes; Non-metallic couplings for tubes; Pipe wrappings for insulation purposes; Pipe linings (Non-metallic -) for sealing pipes; Insulation for underground pipes and tanks; Non-metallic couplings for pipes; Casings of synthetic rubber for tubes; Non-metallic coupling sleeves for tubes; Pipe linings (Non-metallic -); Fittings [non-metallic] for flexible pipes; Joint connectors (Non-metallic -) for pipes; Artificial resins in the form of tubes for use in manufacture; Extruded plastics in the form of tubes for use in manufacture; Plastics in the form of sheets, films, blocks, rods and tubes
20
Pipe fasteners, connectors and holders, non-metallic; Valves, not of metal, other than parts of machines; Pipe clamps of plastics; Collars of plastic for fastening pipes; Hinges, not of metal for the fixing of pipes; Non-metallic fasteners for pipes; Pipe fasteners, connectors and holders; Clamps (non-metallic -) for pipes [other than parts of machines]; Collars [non-metallic] for fastening pipes; Clips, not of metal, for cables and pipes