How should PVC piping be laid in a trench?

• A. In the shortest length possible
• B. In a straight line as possible
• C. By snaking from side to side
• D. Supported firmly at points not more than 10 ft apart

Answer: (C)

Placing PVC in a trench is about letting the pipe follow the trench’s shape and accommodate movement without putting stress on joints. Choosing a snaking, side-to-side layout gives the pipe some flexibility to adapt to irregular trench walls, backfill settling, and minor grade changes. This approach helps spread bending and alignment stresses along a longer run rather than forcing a straight line that might end up pulling tight or creating sharp turns at joints. In practice, you’d still secure the pipe at appropriate intervals and support it as needed, but the side-to-side winding helps the line settle smoothly with fewer stress points. The other options either push the pipe into unnecessary joints, ignore trench contours, or ignore the need for controlled movement and support.