11
Apparatus and installations, all for water supply, sanitary or drainage purposes; conduits for the delivery of water; water distribution installations; water drainage installations; troughs for the delivery of water; water pipes, piping and conduits; drainage systems and installations namely fittings for the draining of water; plastic plumbing systems; water supply systems; water drainage systems; valves (plumbing fittings); parts and fittings for all the aforesaid goods
17
Pipes; conduits; tubes; pipe couplings and junctions, not of metal; pipe connectors; pipe clips and brackets and seals; push-fit fittings for pipes and piping systems; watertight rings for plumbing pipes; flexible plumbing pipes of plastic; parts and fittings for all the aforesaid goods
19
Plastic pipes; large diameter plastic pipes; plastic pipes for plumbing purposes; plastic building materials; drainage systems and installations namely drainage pipes; non-metallic articles and materials, all for use in water supply, water disposal, water drainage and sanitary installations; parts and fittings for all the aforesaid goods
20
Clips, brackets, supports, all comprised primarily of plastics, all for pipes or cables; water-pipe valves of plastic; pipe clips of plastic; valves of plastic for water pipes; stop cocks of plastic; drain traps of plastic; parts and fittings for all the aforesaid goods