Air filtering installations; Air purifying apparatus; Air sterilisers; Apparatus for filtering drinking water; Dehumidifiers for household use; Electric water purification filters for household purposes; Filtering apparatus using activated carbon for filtering spirits; Filters and filtering devices for air and gas conditioning; Personal water filtering devices in the form of straws; Sewage purification installations; Vehicle-mounted air purifying apparatus; Waste water purification apparatus, installations and tanks; Water filtering units; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water softening apparatus and installations; Water treatment equipment, namely, reverse osmosis units