6 Plumbing fittings as are included in this class, being fittings for water and gas supply, including: push-fit fittings in the nature of junctions, straight couplings, reducing couplings, conversion couplings, straight connectors, reducing connectors, bullnose connectors, elbows, reducing elbows, stubout elbows, elbows for pipes for dishwashers, drop ear elbows, hy-ear elbows, branches, tees, bullnose tees, reducing tees, end stops, fitting reducers, threaded adaptors, slip fittings, swivel fittings, swivel adaptors, swivel elbows, slip couplings, slip tees, slip tee adaptors, manifolds including manifolds with branches, angle stops, straight stops, stop valve tee adaptors, stop valve connectors, pipe connections and couplings, conversion tees, tube adaptors, capillary pipe tail pieces, bend supports for piping, compression adaptors, tail piece reducers, tail piece plugs, pipe bend supports, suspension clamps, clamp rings, crimp rings, pipe insulators, pipe clips, sleeves, valve connections and couplings, check valves; parts of and accessories for such goods as are included in this class, including: kits for use by contractors and for installation of plumbing fittings, consisting of connector fittings and disconnect clips; pipes, tubing and tubing couplings for joining and terminating pipes; all the aforesaid goods being made of metal