couplings of metal for pipes; elbows of metal for flexible pipes; fittings of metal for pipes; metal fittings for flexible pipes; pipe fittings of metal; tubing and tubing couplings of metal for joining and terminating pipes

couplings, not of metal, for flexible pipes; fittings, not of metal, for flexible pipes; flexible plastic conduits for plumbing purposes; flexible plastic conduits for plumbing use; flexible plastic pipes for conveying water; flexible plastic pipes for plumbing purposes; flexible plumbing pipes of plastic; pipe couplings and joints, not of metal; pipe fittings comprised primarily of plastic; plastic junctions for flexible pipes; plastic junctions for pipes; plastic plumbing hoses

plastic pipes for plumbing purposes