Why are few metals used for plumbing anymore?

Few metals are used for Plumbing today primarily due to concerns about corrosion, cost, and health risks. Traditional materials like lead and galvanized steel can corrode over time, leading to leaks and contamination. Instead, modern plumbing often utilizes materials like PVC, PEX, and copper, which offer better durability, resistance to corrosion, and lower health risks. These alternatives also tend to be lighter and easier to install, making them more favorable for contemporary plumbing systems.