Chlorinating units for water treatment; Disinfectant apparatus for dispensing solutions into water-pipes for sanitary installations; Filters for use with apparatus for water supply; Ionization apparatus for the treatment of air; Membrane filtration units for water treatment apparatus; Reverse osmosis membrane filters for water treatment; Sewage purification installations; Ultraviolet sterilizers for water treatment; Waste water treatment tanks; Water treatment equipment, namely, water filtrat...