HYLAEA

Branching pipes, not of metal; Ducts, not of metal, for ventilating and air-conditioning installations; Non-metal architectural mouldings and finish trim; Non-metal gutter pipes; Non-metal water pipes; Non-metallic drainage pipes; Plastic conduit for drainage and irrigation; Stair nosing not of metal; Staircases, not of metal; Water-pipe valves, not of metal or plastic