Water purification apparatus; Water purification units; Water treatment equipment, namely, water filtration units; Faucets; Pipes for heating boilers; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Aquarium filters; Filtering units for water filtering; Filters for drinking water; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, reverse osmosis units; Flow restrictors for reverse osmosis water purification units; Membranes for reverse osmosis units; Reverse osmosis membrane filters for water treatment; Reverse osmosis units