This device is not only much less expensive but superior to existing devices in many ways and has following features. 1. Remove bacteria to the extent of > 99.99% ( 4 log scale ) 2. No dead bacteria in product water. 3. Removes complete turbidity and produces crystal clear water. 4. Work in a dead end filter so not a single drop of water is wasted. 5. Does not need electricity or addition of any chemical 6. Provision to remove organic or colouring material if they are present in feed. 7. Highly strong ( both chemically and mechanically ) membranes giving high life ( 3-5 years ) 8. Device work between the hydrostatic heads approx 8 feet heights ( 5 psig to 35 psig )and can produce about 40 litres of pure water per day at about 10 psig head.
