Apparatus for purifying tap water; Commercial refrigerators and freezers and replacement parts and fittings therefor; Filtering units for water filtering, producing potable water for domestic use; Personal water filtering devices in the form of straws; Strainers for water lines; Water filtration and purification units and replacement cartridges and filters therefor; Water filtration apparatus; Water purification apparatus; Water purification units; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; Water purifying apparatus for household purposes; 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, cartridge filtration units; Water treatment equipment, namely, water filtration units and reverse osmosis units