Why is flushing the water system recommended for high iron and manganese levels?

Flushing the water system is recommended for high iron and manganese levels primarily because it cleanses the pipes. Over time, iron and manganese can accumulate within the distribution system, leading to sediment build-up and coloration in the water. This accumulation not only affects water quality by introducing discoloration but can also promote the growth of certain bacteria that thrive in these conditions.

When the system is flushed, the high-velocity water flow helps to dislodge these deposits from the interior surfaces of the pipes, effectively removing the accumulated iron and manganese. This process can improve the overall quality of the water supplied to consumers, ensuring that it meets safety standards and is clear and palatable.

In contrast, while flushing may incidentally improve flow rate or restore water clarity, those are secondary benefits rather than the main reason for performing the flushing. The primary focus is on cleansing the pipes to directly address the issues posed by the presence of high levels of iron and manganese.