Iron is one of the most common elements in the Earth's crust, so it is no surprise it finds it way into many home well waters. The maximum contaminant level (MCL) for iron set by the United States Environmental Protection Agency is 0.3 ppm. This can also be expressed as 0.3 milligrams per liter of water. In concentrations above 0.
According to some estimates, corrosion costs the United States more than $1 billion every year. Besides actual piping failure and pinhole leaks, copper corrosion leaves blue stains on sinks, tubs, fixtures, laundry and hair.
Corrosion can also make the water unfit for drinking. Copper can be toxic and water containing levels over 1.0 mg/L should not be used for drinking.
It helps to have some metalworking experience. Take care when working with a blowtorch in loft spaces. Be aware that pipes take time to cool after exposure to the blowtorch flame. If you can undertake the basic work yourself, you save money and the inconvenience of waiting for a plumber.