Water filtration installations; water purification installations; water filtration and purification apparatus; installations for water filtering; filters for water filtering apparatus; water supply installations; water purifiers for industrial purposes; water purifiers for household purposes; water filters for domestic use; filters for drinking water; membranes for water filtering apparatus; membrane filtration units for water treatment apparatus; water treatment filters; drinking water filters; water filtration jugs; water filtering units; water purifiers; water purifying machines; water conditioning systems