Water desalination plants using reverse osmosis; water softening units for household, professional, and industrial use, and their structural components and accessories, namely, valves and replacement parts for water softening units; household water pipe fittings, namely, pressure regulators for water pipe installations, mixer taps, and faucets for water pipes, and their spare parts and components; fittings for domestic water installations, namely, mixer taps for water pipes and their replacem...