Dear Stephanai Tam ...
Published by Prem Baboo, Researcher at www.researchGate.net
Dear Stephanai Tam
Procedure of the Roof water tank
- Inform all residence persons using water before cleaning the tank(about one day so that they adjust accordingly)
- Open man hole cover
- Disconnect all In/out line isolation valves.Drain total water.
- Tank cleaning manually for any dirt/sand/algae etc.
- Apply some Bleaching Powder wait 10 min and washed out all effluent.
- Rinse with fresh water and drain out.
- Then tank to be taken in line again. Closed man hole cover properly and locked.
- Informed to all residence persons they drain water for five min with opening tap
- This exercise takes about one hour .
Good luck!
Prem Baboo