Air filtering installations; Air filters for air conditioning units; Air filters for domestic use; Air filters for industrial installations; Aquarium filters; Fibrous filtering media for general industrial use in the purification of air and industrial fluids; Filters and filtering devices for air and gas conditioning; Filters for air conditioning; Filters for drinking water; Filters made of fiber for water filtration; HEPA filters for household use; Metal cylindrical chamber and screen for use in filtering and removing settleable solids from liquid; Swimming pool water cleaning and filtering units; Water filtering units for domestic, commercial, or industrial use; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water