7
Water heaters [parts of machines]; Water separators; Feedwater regulators; De-aerators for feedwater; Machines for the mineralization of drinking water; Sewage pulverizers; Filters being parts of machines or engines; Filter presses; Compressors as parts of machines, motors and engines; Cartridges for filtering machines; Filtering machines, separators and centrifuges; Filling machines; Pumps [machines]; Pressure pumps; Reverse osmosis pumps; Expansion tanks [parts of machines]; Pump diaphragms; Air cleaners [air filters] for engines
11
Water purifying apparatus and machines; Water purification installations; Filter apparatus for water supply installations; Water filtering installations; Filters for drinking water; Filters for wastewater; Taps; Mixer taps for water pipes; Apparatus for decalcifying water; Water softening apparatus and installations; Water sterilizers; Desalination plants; Germicidal lamps for purifying air; Combined lighting and ultraviolet apparatus; Reverse osmosis membrane filters for water treatment; Water desalinating apparatus utilizing reverse osmosis; Apparatus for descaling water; Water disinfection apparatus; Cooling installations for liquids; Level control valves; Pressure water tanks; Flushing tanks; Water distribution installations; Membranes for reverse osmosis units; Ozonizers for sanitizing purposes; Indoor fountains; Air purifiers; Air sterilizers; Air purifying apparatus; Humidifiers; Air-conditioning apparatus
40
Water treatment [demineralising] services; Waste water treatment; Water treating; Air deodorizing; Air treatment; Air purification