Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Coffee percolators, electric; Filters for drinking water; Filters, heaters and pumps sold in combination for use in swimming pools or hot tubs; Filters, heaters and pumps sold in combination for use in swimming pools; Separators for the cleaning and purification of gases; Separators for the cleaning and purification of liquids; Swimming pool chlorinating apparatus; Swimming pool water cleaning and filtering units; Tap-water purifying apparatus; Water filtering apparatus; Water filtering devices, namely, water purification installations for waste water and sewage consisting of curtains and textile fabrics; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water filtration and purification units and replacement cartridges and filters therefor for refrigerators, ice makers; Water purification and filtration apparatus; Water purifying units, for potable water for domestic, commercial or industrial use; Water softening apparatus and installations; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, reverse osmosis filtration units