Desalination units; Feed water heaters ; Filtering units for commercial, industrial and/or agricultural uses and/or, producing potable water for domestic use; Flow restrictors for reverse osmosis water purification units; Industrial-water purifying apparatus; Regulating accessories for water supply, namely metered valves; Water desalination plants; Water distillation units; Water distilling units; Water filtering units for domestic, commercial, industrial and/or agricultural use;; Water filters; Water purification units; Water purifiers; Water purifying apparatus; Water purifying units, for potable water for commercial, industrial and/or agricultural uses and/or, producing potable water for domestic use; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, chemical sterilization units; Water treatment equipment, namely, reverse osmosis filtration units; Water treatment equipment, namely, ultraviolet sterilization units