Apparatus for filtering drinking water; Chlorinating units for water treatment; Coffee filters not of paper being part of electric coffee makers; Drinking fountains; Electric coffee percolators; Filtering units for water filtering, producing potable water for domestic use; Filters for air conditioning; Filters for drinking water; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water filtration and purification units and replacement cartridges and filters therefor for refrigerators, ice makers; Water filtration apparatus for the deionization of water; Water purification and filtration apparatus; Water softening apparatus and installations; Water softening units