Mr. Kumarasamy, The only way ...

Mr. Kumarasamy, The only way to remove biofilm from services is by shock dosing with chlorine dioxide @200 ppm. Keep the water in the service pipeline for 2-3 hours. Then drain out the water. Once all the biofilm is removed from the pipeline system, you can then move to a constant dosing of the drinking water @1ppm dose. USEPA has approved the use of chlorine dioxide in drinking water upto a dose of 5ppm. Once the water is constantly dosed with chlorine dioxide there will be no growth of new biofilm.