Which type of pipe is commonly used for drain, waste, and vent (DWV) systems?

The type of pipe that is commonly used for drain, waste, and vent (DWV) systems is PVC. This is primarily because PVC (polyvinyl chloride) possesses several beneficial properties that make it an ideal choice for plumbing applications. It is lightweight, which eases handling and installation. Additionally, PVC is resistant to corrosion and many chemicals that may be found in waste disposal, ensuring the longevity and reliability of the system.

Furthermore, PVC pipes are readily available in various sizes and are cost-effective compared to other materials. Their smooth interior surfaces facilitate the efficient flow of waste material, reducing the likelihood of clogs. PVC also has a good track record for durability under normal plumbing conditions, making it a preferred material for DWV systems in both residential and commercial applications.