19 NON-METAL PIPES, NAMELY PLASTIC PIPES, THERMOPLASTIC PIPES, GLASS FIBRE REINFORCED POLYESTER PIPES, GLASS FIBRE REINFORCED EPOXY PIPES, POLYCRETE PIPES, CEMENT AND CONCRETE PIPES FOR BUILDING, NAMELY PENSTOCK PIPES, DRAIN PIPES, GUTTER PIPES, BRANCHING PIPES; NON-METAL MANIFOLDS FOR PIPELINES