Which material is typically used for residential water supply pipes?

The use of copper or PEX for residential water supply pipes is widely accepted due to their excellent properties for plumbing applications. Copper is durable, resistant to corrosion, and has a proven track record in plumbing systems, providing a long-lasting solution for water supply. It can withstand high temperatures and pressures, making it suitable for both hot and cold water lines.

PEX, or cross-linked polyethylene, is increasingly popular for residential plumbing because it is flexible, easy to install, and not prone to corrosion or scale buildup. PEX can be snaked into walls and around corners without the need for numerous fittings, which streamlines installation and reduces potential leak points.

Overall, the combination of these two materials offers a balance of durability, flexibility, cost-effectiveness, and performance, aligning well with the demands of modern residential plumbing systems.