Water desalination apparatus using reverse osmosis; water softeners with components and accessories, for household use, for professional use and for industrial use; household water pipe fittings; water pipe regulation accessories; fittings for domestic water installations; aerators for faucets; shower heads as parts of water supply installations; water conditioning apparatus; hot water apparatus; water distribution apparatus; water filtering apparatus for household use; filtering apparatus for water supply installations; water softening apparatus; apparatus for supplying drinking water; drinking water filtering apparatus; tap-water purifying apparatus; filtering boxes for water purification; mixer taps for water pipes; water dispensers; stand-alone or integrated dispensers, and spouts for still water, sparkling water, cold water, hot water or boiling potable water; water-filtering devices for household use; filter elements for the drainage of water supply tanks; reverse osmosis elements for reducing the salt content of water; water filtering equipment; water purification equipment for drinking water production; mixer taps [faucets]; water sterilizers; water filters; drinking water filters for household use; energy filters for water purification [other machines]; faucet filters [plumbing fittings]; reverse osmosis membrane filters for water treatment; electric water-purifying filters for household use; electrostatic filters for filtering water; coarse filters for water; filters for drinking water; filters for water filtering apparatus; water purification filters; filters for water distribution devices; water treatment filters; water purification filters; filters for use with apparatus for sanitary purposes; filters for use with water supply apparatus; cold water fountains; faucets; automatic faucets; electrically controlled water faucets; water flow control faucets; hands-free faucets; mixing taps for water pipes; water economizer faucets; mixer taps; single-lever faucets for sinks; faucets for sanitary installations; faucets for water pipes; water filtering installations; water treatment installations with their components; water ionizers; flow limiters for reverse-osmosis water purification units; controls for faucets; membranes for filtering water; membranes for reverse osmosis units; membranes for water filtering apparatus; faucet sprayers; water-pipes for sanitary installations; filtration units for purifying water [other than machines]; reverse-osmosis filtration units [water treatment equipment]; reverse osmosis units; water control valves for faucets; mixing valves [faucets]; valves being parts of sanitary installations [faucets].