Cleaning of Water Storage Tank or Sump by following method 1 Empty the Tank Sump and make it to near dry 2 Apply bleaching powder uniformally and Tankcapacity x 0 5 gms litre) inside the Tank Sump and wait for one hour 3 After one hour clean rinse the Tank Sump with fresh water Repeat the process 2 and 3 for two to three times all complete as directed by the Engineer incharge.
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