Water filtering apparatus; Filtering units for water filtering; Swimming pool water cleaning and filtering units; water cleaning and filtering units for spas; Water filtering units for domestic, commercial and industrial use; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, reverse osmosis filtration units; Water purification and filtration apparatus; Water treatment equipment, namely, water filtration units; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; Water filtration apparatus for the deionization of water; Filters made of fiber for water filtration; Filters for fluids, namely, for water and area-water solutions; water filters; Filtering units for filtering oil; oil filters; Metal cylindrical chamber and screen for use in filtering and removing settleable solids from liquid; Air filters for industrial installations; Industrial air filter machines; Air filters for domestic use; Air filtering installations; Fibrous filtering media for general industrial use in the purification of air and industrial fluids; Filtering units for filtering liquids, filtering chemicals, filtering beverages, filtering gas, and filtering air; filtering units for producing food, beverages, and chemicals; filtering units for filtering liquids, air and gas; filtering units for producing consumer products; filters for petroleum products, gasoline, oil, kerosene, and fuel oil; filters for potable liquids such as soda pop, beer, wines, juices; industrial coolant filters for machine tools, grinders, rifle boring, washers; Water filters for use in producing potable water for domestic and industrial use; and filtering units used to remove sediment from liquids or to aid in odor reduction and taste improvement for domestic and industrial use; filtering cartridges used to remove sediment from liquids and to aid in odor reduction and taste improvement of liquids for domestic and industrial use; filters used in metal finishing machines, namely, plating chemical solution filters