Pipe fittings, not of metal; Non-metal fittings for rigid pipes; Hose fittings, not of metal; Fittings, not of metal, for hoses; Hose couplings, not of metal; Couplings, not of metal, for hoses; Non-metal couplings for hoses; Non-metal couplings for use with hoses; Flexible plastic pipes for plumbing use; Flexible plastic conduits for plumbing purposes; Flexible plastic conduits for plumbing use; Non-metal flexible hoses for conveying liquids; Flexible tubes, not of metal; Flexible tubes of r...