water flushing installations; water flushing installations for toilets; water purifiers for household use; filters for water purifiers; water purifiers for household purposes; apparatus for purifying water; water purifiers for industrial use; filters for air purifiers; water purifying apparatus for household use; water purifiers for industrial purposes; electric water purifiers for household purposes; electric air purifiers; devices and systems for purifying water comprised of water filters; tap water purifying apparatus; water purifiers; water purifiers, electric; water purifying units for producing potable water; water purifying apparatus; industrial apparatus for purifying water; water purifying machines; water conditioning systems; water purifying apparatus and machines; water-pipes for sanitary installations; water intake apparatus; watering machines for agricultural purposes; water softening installations; purification installations for sewage; pressure water tanks; filters for water filtering apparatus; water purification installations; desalination plants; water purifying installations; water supply installations; water distribution installations; water heaters; water sterilisers