Apparatus, machines and installations for water purification, namely, water purification machines and installations, and water purification and filtration apparatus; industrial plug-in installations for water purification, namely, water purifying units for potable water for industrial use; pressure water tanks; water conduits, namely, pipes being parts of water purifying units; water intake, water distribution and water supply installations, namely, water faucet, water faucet spouts and sinks; water purification installations; plumbing installations, namely, valves; water filtering apparatus; carbon filters for drinking water; disinfectant apparatus, namely, disinfectant dispensers for toilets; stills in the nature of water distillation units; distillation apparatus, namely, distilling units; filters for drinking water, namely, changeable domestic filters for complex fining of drinking water; water treatment equipment, namely, changeable filter cartridges for water; membranes for water purification; multimedia mechanical filters, namely, water filters; sodium-cation and hydrogen-cation filters, namely, aquarium filters; nitrate-selective water filters; organocapture filters, namely, filters for drinking water; domestic and industrial systems of reverse osmosis and nanofiltration systems, namely, reverse osmosis and nanofiltration water purification units; water filtering apparatus; regulating and safety accessories for water supply, namely, pressure regulators and metered valves; systems of water purification and conditioning, namely, water purification and conditioning units; systems for complex purification of domestic water, namely, complex water purification units; systems for disinfection of drinking water, namely, apparatus for filtering drinking water; sterilizers for water; installations for water treatment, namely, waste water treatment tanks; installations for water filtering, namely, water filtering apparatus; installations for water preparing for production of beverages, namely, water purification units; purification installations for sewage; installations and apparatus for water softening; installations for demineralization of sea water, namely, sea water demineralization units; ultraviolet ray filters for disinfection in the nature of disinfecting ultraviolet lamps housed in a container or cover for disinfecting objects placed therein; water treatment units for domestic use, namely, water filtration, ionization and reverse osmosis units combined into one unit for water purification; air filters for domestic and industrial installation; filters for drinking water