13 WASTES, OVERFLOWS, CONNECTED WASTES AND OVERFLOWS, PLUMBING-TRAPS, CLOSET-BENDS, SUPPLY-PIPES, WASTE-PIPES, SINK-PLUGS, SINK CONNECTIONS, PIPE-COUPLINGS, NUTS, FLANGES, CHAIN-STAYS, REFILL-TUBES, TANK-BRACKETS, THREADED RODS, STRAINERS, AND VENT-TUBES.