Air valves for steam heating installations; Apparatus for filtering drinking water; Automatic faucets; Bathtubs and shower trays; Cocks for pipes and pipelines being parts of sanitary installations; Coils as parts of distilling, heating or cooling installations; Cooling installations for water; Discharge lamps and their fittings; Drain structures for use in spas, steam rooms and baths; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems...