Water purification installations; Water purifying apparatus and machines; Water softening apparatus and machines; Water supply installations; Ventilation installations and apparatus; Water supply networks; water distribution networks; Water filtering networks; Purification installations for sewage; Filters for drinking water; Air deodorising apparatus; Air filtering installations; Air purifying apparatus and machines

Chemical disinfectants for desalination plants; Chemical antiseptics for desalination plants; Anti-incrustants; Grease remover; Acid proof chemical compositions; Chemical additives for oils; Detergent additives to petrol (gasoline); Chemical additives to motor fuel; Ethyl alcohol; Volatile alkali (ammonia) for industrial purposes; Salts of alkaline metals; Aluminum alum; aluminum chloride; Aluminum hydrate; Ammonia; Ammonia (volatile alkali) for industrial purposes; Anti-boil preparations for engine coolants; Antifreeze; Soda ash; Bacterial preparations other than for medical and veterinary use; Bases (chemical preparations); Caustic soda for industrial purposes; Caustics for industrial purposes; chemical additives for oil; Chimney cleaners, chemical; Oil dispersants; Petroleum dispersants; Emulsions; Flocculants; Glycol; Glycol ether; Degreasing preparations for use in manufacturing processes; Grease-removing preparations for use in manufacturing processes; Hypochlorite of soda; Cultures of microorganisms other than for medical and veterinary use; Preparations of Microorganisms other than for medical and veterinary use; Nitrates; Nitric acid; Phosphoric acid; Salt, raw; Salts for industrial purposes; Scale removing preparations, other than for household purposes; Sebacic acid; Silicates; Sulphuric acid; Surface-active chemical agents; Ungluing preparations; Water-softening preparations; Water purifying chemicals

Apparatus for water supply