Environmental Protection Agency (EPA) Model Lead Based Paint Risk Assessor Practice Test

What material commonly found in plumbing systems may introduce lead into drinking water?

1. Plastic pipes

2. Copper piping

3. Brass fittings

4. Galvanized steel

The correct answer is: Brass fittings

Brass fittings are commonly found in plumbing systems and may introduce lead into drinking water due to the alloy composition. Brass is typically made from a mixture of copper and zinc, but it can also contain small amounts of lead to improve workability and corrosion resistance. Over time, especially if the water is acidic or has low mineral content, lead can leach from these fittings into the drinking water. This is particularly concerning in older plumbing systems that still utilize brass components, as regulations regarding lead content in plumbing materials have evolved. Understanding how lead can enter drinking water through brass fittings highlights the importance of monitoring and maintaining plumbing systems to minimize health risks associated with lead exposure.