What materials are used for water supply?

Water supply systems typically use a variety of materials, including PVC (polyvinyl chloride), HDPE (high-density polyethylene), ductile iron, and copper for piping. These materials are chosen for their durability, resistance to corrosion, and ability to withstand pressure. Additionally, concrete is often used for storage tanks and treatment facilities. The selection of materials can also depend on local regulations, environmental conditions, and the specific needs of the water supply system.