Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filters for domestic use; Air humidifying apparatus; Air purifiers; Air sterilisers; Apparatus for filtering drinking water; Filters and filtering devices for air and gas conditioning; HEPA filters for household use; Membrane filter cartridges for the separation of biomolecules in biopharmaceutical production; Plumbing fittings, namely, faucet filters; Vehicle-mounted air purifying apparatus; Water filtration and purification units and replacement cartridges and filters therefor; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, ultraviolet sterilization units; Water treatment equipment, namely, water filtration units and reverse osmosis units