Air cleaning units; Air humidifying apparatus; Air purifiers; Apparatus for filtering drinking water; Drinking fountains; Electric bath-water purifying apparatus for household purposes; Electric coffee makers; Electric water purifiers for household purposes; Household air cleaners; Industrial-water purifying apparatus; Irrigation sprinklers; Personal water filtering devices in the form of straws; Sewage purification installations; Tap-water purifying apparatus; Water filtering units for domes...