What materials are allowable for a building sewer pipe?

Building sewer pipes must be constructed from materials that can withstand the conditions they will encounter, including soil pressure, moisture, and potential chemical exposure. The correct materials must also be durable and able to ensure proper function over time.

PVC (Polyvinyl Chloride), SDR-35, cast iron, and clay are all acceptable materials for building sewer pipes because they meet the necessary structural and performance standards. PVC is lightweight, resistant to corrosion, and allows for quick installation. SDR-35 demonstrates good strength-to-weight properties, making it suitable for gravity sewer applications. Cast iron provides excellent durability and is often used in commercial applications due to its ability to handle heavy loads. Clay pipes are known for their longevity and resistance to deterioration, making them a traditional choice for sewer applications.

The other options include materials that are not typically approved for building sewer pipe use, either due to their physical properties or potential for failure in sewer service conditions. Understanding the correct materials and their applications is essential for ensuring compliance with plumbing codes and regulations.