Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filtering installations; Air filters for industrial installations; Filtering units for use in public locations; Filters and filtering devices for air and gas conditioning; Filters for drinking water; Floor water fountains; Tap-water purifying apparatus; Wall water fountains; Washing machine water treatment device connected to the cold water inlet to eliminate need for detergent; Waste water purification apparatus, installations and tanks; Water filtering apparatus; Water filtering units for water coolers, ice, coffee and soda machines, other dispensing equipment. use; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water fountains; Water purification and filtration apparatus; Water purification installations; Water purification machines; Water purification units; Water purifiers; Water purifying apparatus; Water purifying units, for potable water for drinking purposes.; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, chemical sterilization units; Water treatment equipment, namely, reverse osmosis filtration units; Water treatment equipment, namely, reverse osmosis units; Water treatment equipment, namely, ultraviolet sterilization units; Water treatment equipment, namely, water filtration units; Water treatment equipment, namely, water filtration units and reverse osmosis units