... drinking water purifier, 5 stages RO water purifier, RO water filters, for tap water.Reverse Osmosis drinking water purifier: Model: RO ... . It remove the following hard water contaminants that may be present in your water: lead, cooper, barium, chromium, mercury, sodium, cadmium, fluoride, nitrite ... reverse osmosis water filter system at 24 hours a day. House hold water purification system