11 Apparatus and installations for water treatment, namely, cartridge filtration units, chemical sterilization units, reverse osmosis filtration units and ultraviolet sterilization units; installations and filters for water sterilization removing bacteria and viruses, purifying filters, water filters for drinking water, namely, membrane filters for microfiltration, ultrafiltration, nanofiltration, reverse osmosis; components and accessories for installations and apparatus for water treatment, namely, water filters, especially filter discs, sachets, substrate bags, tank filters, port filters, filter heads particularly containing sensory components; electrostatic water treatment apparatus; water filtering apparatus; gas infusing apparatus, namely, water treatment units for aerating and carbonating water; water treatment systems consisting of water coolers, filtration units, water aerating and carbonating apparatus; water filters and water filtering apparatus using membrane technology, reverse osmosis technology, UV technology, ozone technology, carbon technology particularly with blocks of activated carbon and carbon briquettes; water filters and water filtering apparatus for microbiological sterilization; Pressure-driven water filters; gravity water filters, suction water filter cartridges, hand-operated water filter cartridges, water filter cartridges with a sunken filter mechanism, water filter cartridges with ion exchangers and adsorbents included in this class, for water filters, kettles, coffee machines, tea machines, espresso machines, samovars, rice cookers, automatic vending machines, large catering apparatus, ice machines, steam cookers, combination steamers, ovens, percolators, dishwashing machines, refrigerators, refrigerating apparatus; cold drink dispensers; faucets with integrated filter systems; refrigerated dispensing units for beverages, namely, water dispensers, chilled beverage dispensers; beverage dispensers, except vending machines, being refrigerated dispensing units for beverages; automatic water treatment equipment being water treatment appliances, namely, carbon block and cartridge filtration units, chemical sterilization units, reverse osmosis filtration units, and ultraviolet sterilization units apparatus and sensors for measuring water quality and for indicating to users whether water requires treatment or whether a water filter requires replacement; automatic water treatment equipment, namely, water filters with automatic cut-off fitted with consumption indicators, faucets, filters; drinking water filtering units for the mineralization of water; heating devices, namely, water heaters; cooling devices, namely, cooling installations for water; apparatus for filtering drinking water with flavoring devices and carbon dioxide devices; water treatment installations consisting of the aforesaid apparatus, namely, apparatus for filtering drinking water; electric kettles; beverage-cooling apparatus