What types of materials are prohibited for use in potable water systems under UPC?

Lead and galvanized steel are prohibited materials for use in potable water systems due to their potential to contaminate the water supply. Lead is a well-known toxic material that can cause serious health issues, particularly affecting children and pregnant women. Its use in plumbing systems has been restricted to protect public health.

Galvanized steel, while not toxic in the same way as lead, can corrode over time, leading to the leaching of harmful substances into drinking water and contributing to water quality issues. This corrosion can also cause physical blockages in the plumbing system and reduce water pressure.

In contrast to lead and galvanized steel, other materials such as PVC, CPVC, polyethylene, and rubber are often used in potable water systems as they do not pose the same risks of heavy metal contamination or detrimental corrosion.