Texas Wastewater Class B Practice Exam

What are the most common pipe materials used for sewer lines?

1. Steel and plastic

2. Clay and PVC

3. Clay and Poly Vinyl Chloride (PVC)

4. Only concrete

The correct answer is: Clay and Poly Vinyl Chloride (PVC)

The most common pipe materials used for sewer lines include clay and Polyvinyl Chloride (PVC). Clay pipes have been traditionally used for many years due to their robust nature, resistance to corrosion, and longevity. They are especially valuable in gravity flow applications since they handle the weight of the soil well. PVC pipes, on the other hand, have gained popularity because of their lightweight, ease of installation, and resistance to degradation from chemicals. The combination of clay and PVC represents a balance between traditional durability and modern flexibility, making them the preferred choices for sewer systems. The other materials mentioned, such as steel and concrete, generally aren't as common for sewer lines. Steel is prone to corrosion and is less frequently used today due to maintenance concerns. Concrete has its applications but is often reserved for larger diameter pipes or specific engineering contexts rather than common sewer lines.