PIPES BEING PART OF SANITARY FACILITIES, NAMELY, NON-METAL PIPES, NON-METAL PIPE FITTINGS AND NON-METAL JUNCTIONS AND NON-METAL LINERS FOR METAL PIPES FOR CONVEYING HOT AND COLD WATER, WASTE WATER, GEOTHERMAL WATER AND AQUEOUS SLURRIES AND SUSPENSIONS FOR USE IN WATER SUPPLY SYSTEMS AND WASTE WATER TREATMENT