Which materials are often prohibited in water distribution systems due to corrosion concerns?

Galvanized steel and lead are often prohibited in water distribution systems primarily due to their susceptibility to corrosion and the negative health impacts associated with lead.

Galvanized steel can corrode over time, especially when exposed to moisture, leading to the release of rust and sediment into the water supply. This not only affects the quality of the water but can also restrict water flow and damage plumbing fixtures.

Lead is particularly concerning due to its toxicity. Exposure to lead in drinking water can result in serious health issues, especially in children, including developmental problems and neurological damage. As a result, many jurisdictions have enacted strict regulations limiting or banning the use of lead in plumbing systems.

In contrast, materials like copper, stainless steel, and modern plastics such as PVC and PEX are generally favored for their corrosion resistance and safety in water distribution systems.