What type of piping material is often used for drain, waste, and vent systems?

The piping material commonly used for drain, waste, and vent (DWV) systems is polyvinyl chloride (PVC). PVC is favored in these applications due to its excellent resistance to corrosion and chemicals, lightweight nature, and ease of installation. It is also cost-effective compared to other materials, making it a popular choice in residential and commercial plumbing systems.

PVC’s smooth interior surfaces help prevent buildup of deposits that can occur in rougher materials, ensuring more efficient flow of wastewater. Additionally, PVC piping can be easily cut to length and glued together using solvents, allowing for quick assembly with minimal tools.

In contrast, options such as cross-linked polyethylene (PEX) are primarily used for hot and cold water supply lines rather than drain systems, while galvanized steel and copper are often utilized in specific plumbing applications like water supply, not in DWV systems.