6
CONNECTION FITTINGS IN THE NATURE OF HOSE FITTINGS, PIPE FITTING, PIPES, AND TUBES, ALL MADE OF METAL AND ALL FOR USE IN HYDRONIC HEATING SYSTEMS
11
APPARATUS FOR HEATING, REFRIGERATING AND WATER SUPPLY, NAMELY, TUBING, FITTINGS, PANELS, MANIFOLDS, WATER HEATERS, AND OTHER COMPONENTS; CENTRAL HEATING RADIATORS FOR HEATING BUILDINGS; HOT WATER EXPANSION TANKS FOR CENTRAL HEATING INSTALLATIONS AND RADIANT PANEL SYSTEMS; RADIANT PANEL HEATERS FOR RESIDENTIAL, COMMERCIAL AND INDUSTRIAL USE; HEAT ACCUMULATORS AND HEAT EXCHANGES, NOT BEING MACHINE PARTS HEAT PUMPS; HEATING APPARATUS, NAMELY, HYDRONIC HEATING SYSTEMS; HEATING ELEMENTS; HEATING INSTALLATIONS AND HOT WATER HEATING INSTALLATIONS; WATER HEATING INSTALLATIONS; PIPES BEING PARTS OF WATER HEATING INSTALLATIONS AND RADIANT PANEL SYSTEMS; RADIATORS FOR HEATING BUILDINGS; THERMOSTATIC VALVES BEING PARTS OF HEATING INSTALLATIONS; TAPS FOR WATER PIPES; WATER CONDUIT INSTALLATIONS FOR HEATING FLOORS, CEILINGS AND ROOFS; HYDRONIC FLOOR WARMING AND FLOOR HEATING SYSTEMS COMPRISED OF TUBING, FITTINGS, PANELS, MANIFOLDS, WATER HEATERS AND OTHER COMPONENTS; FITTINGS FOR WATER AND HEATING SYSTEMS, NAMELY BIBS, COCKS, TRAPS AND VALVES
17
PIPES AND TUBES OF PLASTIC, FOR USE IN WATER HEATING SYSTEMS; CONNECTION FITTINGS IN THE NATURE OF PLASTIC PLUMBING PIPES AND FITTINGS