Air cleaning units; Apparatus and installations for decomposing toxic substances in water; Apparatus and instruments for use in the purification, separation and sterilization of liquids and gases used in the biotechnology, pharmaceutical, medical, biopharmaceutical and food and beverage industries; Apparatus for disinfecting water; Apparatus for filtering drinking water; Desalination units; Electrolytic water generators for electrically decomposing tap water to generate electrolytic water and for removing chlorine odor from tap water; Electrostatic water treatment apparatus; Refrigerators; Waste water purification apparatus, installations and tanks; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water purification and filtration apparatus; Water purification installations; Water purification tanks; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; Water softening apparatus and installations; Water sterilisers; Water treatment apparatus, namely, clarification and thickening machines for use in treatment of liquids in the nature of water, waste water and industrial water; Water treatment equipment, namely, water filtration units and reverse osmosis units