can be attached. Another reservoir is placed at the lower end, which collects purified water. The two chambers are stackable and arranged so that the entire system can function on gravity. The Tata Swach Smart is a variant with a more compact design, holding . Tata Swach Bulb Tata Swach Bulb is the main purifying unit of the product. The Swach Bulb, depending on the quality of water, can purify about of water, after which the bulb must be replaced. The bulb has a "fuse" indicating when a cartridge change is required. See also Nanotechnology in water treatment References External links Tata Swach Official Website Water supply and sanitation in India Sanitation companies Tata Chemicals