11 PLUMBING, HEATING AND VENTILATION PARTS AND FITTINGS-NAMELY, TUBING; ELBOWS; T'S, Y-FITTINGS, UNION COUPLINGS, COUPLINGS; CAPS; ADAPTERS, AIR CHAMBERS, BUSHINGS, REDUCERS; TRAPS; VENTURIS; BRANCH CONNECTORS; BULKHEAD FITTINGS; CROSSES; CROSSOVERS, ECCENTRIC COUPLINGS; EXPANSION JOINTS; DRAIN FITTINGS, FLANGED SINK ELLS, RETURN BENDS, FLANGED FITTINGS; T'S AND ELBOWS; CLOSET FLANGES, FLOOR FLANGES, CONNECTORS AND ADAPTERS FOR SOIL PIPE, CLOSET ELBOWS; PIPE HANGERS, STACK AND DRAINAGE FITTINGS ALL FABRICATED FROM COPPER, WROUGHT COPPER, OR CAST BRASS OR BRONZE OR FABRICATED OF A MOLDED, CAST OR EXTRUDED PLASTIC; ALSO VALVES, INCLUDING SILLCOCKS, BOILER DRAINS, GLOBE, BALL, ANGLE AND U-VALVES, STOP AND WASTE VALVES, CHECK VALVES, BUTTERFLY VALVES, MANUFACTURED OF CAST BRASS, BRONZE OR IRON FOR USE IN HEATING, PLUMBING AND VENTILATION SYSTEMS AND INSTALLATIONS