Which of these materials is commonly used for potable water piping?

Copper is widely recognized as a suitable material for potable water piping due to its unique characteristics. It has natural antimicrobial properties, which help inhibit the growth of harmful bacteria in the water supply. This makes copper an excellent choice for maintaining water quality and safety.

Additionally, copper pipes are durable and resistant to corrosion, which extends their lifecycle compared to some other materials. They can also handle high temperatures and pressures, making them versatile for various plumbing applications. The ease of installation and ability to be joined through soldering adds to their appeal in both residential and commercial plumbing systems.

While other materials listed may have specific applications, they do not offer the same level of performance and reliability for potable water distribution as copper does.