Dear Mohsan, Water ...

Dear Mohsan,

Water stability, tendency of water to scale or corrode, depends on the pH value. Saturation pHs depends on total alkalinity, calcium hardness, total dissolved solids and temperature. Monitoring the pH will give an idea about the water stability.

Following are reason in long line.

1. Small increase in the total alkalinity noticed with an appreciable value of phenolphthalein alkalinity which reflects the formation of carbonate toward the end of the carrying pipes. This may  increase in the pH and LSI values.

2. Corrosion of the pipe line.

3. Increase of Iron Ion.

4.Minor leakage in pipe line (ejector effect)

5. Dissolve O2 Iron Get passivate.