What is the C-Value of a newly installed PVC pipe?

The C-Value, or roughness coefficient, of pipe materials is a critical factor in hydraulic calculations, as it affects the flow capacity of the pipe. For newly installed PVC pipes, the C-Value typically ranges from 150 to 160, and it can be recognized that modern PVC can indeed reach values above 150 due to its smooth internal surface.

The choice indicating a C-Value of 150+ accurately reflects this range, accounting for the performance of a pristine PVC pipe immediately after installation, which contributes to its efficient flow characteristics. The lower roughness promotes reduced friction losses compared to older or rougher pipe materials like cast iron or concrete, thus facilitating enhanced water flow.

In contrast, the other options suggest values that exceed what is commonly accepted for new PVC piping. A C-Value of 100 is typically associated with very smooth materials, which does not apply to PVC. Similarly, values like 200 and 250 are excessively high for a newly installed PVC pipe and may pertain to other materials or conditions not applicable to standard PVC installations. Understanding the C-Value range is essential for proper system design and efficient operation in water distribution systems.