PVC (PSM) sewer pipe markings must appear at intervals of no more than five feet. Which option best expresses this requirement?

PVC (PSM) sewer pipe markings must appear at intervals of no more than five feet. Which option best expresses this requirement?

• A. Every 2 feet
• B. Every 5 feet or less
• C. Every 8 feet
• D. Only at joints

Answer: (B)

Regular visibility of pipe markings along the length of PVC sewer pipe is about ensuring anyone working on or inspecting the line can quickly identify the pipe material. The rule states that markings must appear at intervals no more than five feet, so the markings should be spaced five feet apart or closer. For a typical run, this means you’d place a marking roughly every five feet, or more frequently if desired, to keep the identification visible from the trench to the end of the line. This prevents gaps where the material might be mistaken for something else and supports safer, faster excavation and maintenance. Marking every eight feet would create gaps larger than allowed, and marking only at joints would miss identification between joints.