Here are some common materials used for water supply pipes.
Although once used in gas piping, this is no longer allowed in some jurisdictions.
It is also resistant to both hot and cold temperatures.
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Most plumbers prefer PEX tubing over copper and other plastics for water supply pipes.
If you have a house from before the 1960s, you may still have galvanized water lines.
They are treated with a galvanized zinc coating to prevent water from corroding them.
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However, galvanized pipe for water distribution is still used in larger commercial applications.
PVC is also very common in pool and spa systems.
Depending on its thickness (schedule), it can withstand temperatures up to 180 degrees Fahrenheit.
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PVC remains the top choice for water drainage.
Choose PEX to bring and transport potable water within the home.
Choose PVC to drain away waste water.
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Generic polyethylene piping works great for an outdoor water line that only carries cold water.
It’s flexible, durable, potable-water-safe, and inexpensive.
Designing PEX Plumbing Systems to Optimize Performance and Efficiency.
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American Society of Plumbing Engineers.
Healthy Housing Reference Manual: Chapter 9: Plumbing.
U.S. Centers for Disease Control and Prevention.
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InterNACHI’s Standard Estimated Life Expectancy Chart for Homes.
International Association of Certified Home Inspectors.
