11 Connecting pieces, accessories and apparatus for water supply, air conditioning, heating, refrigeration, cooling, sanitation, ventilation, gas and water installations; valves, namely, valves [plumbing fittings], thermostatic valves, pressure relief valves [safety apparatus] for water pipes, safety valves for gas apparatus, valves as part of radiators, water control valves, thermostatic valves as parts of heating installations; parts, components and fittings for all the aforesaid goods.