Drinking fountains; Energy storage plants; Filtering units for water filtering, producing potable water for domestic use; Filters for drinking water; Water filtration and purification units and replacement cartridges and filters therefor; Water purification machines; Water purification units; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; Water purifying apparatus and machines; Water purifying apparatus for household purposes; Water purifying units, for potable water for domestic, commercial or industrial use; Water treatment equipment, namely, chemical sterilization units; Water treatment equipment, namely, reverse osmosis filtration units; Water treatment equipment, namely, reverse osmosis units; Water treatment equipment, namely, water filtration units and reverse osmosis units