11 Water treatment apparatus, namely, water purification and filtration apparatus, water purification installations, water purification machines, water purification tanks, water purification units, and water purifiers; water treatment units; water treatment filters; water treatment cartridges; apparatus, instruments and installations for filtration, purification, softening, sterilisation, sanitation, sanitisation, desalination, demineralisation, deionisation, electrodeionisation, oxidation and clarification of water; water treatment cartridges for the filtration, purification, softening, sterilisation, sanitation, sanitisation, desalination, demineralisation, deionisation, electrodeionisation, oxidation and clarification of water