Before backfilling trenches, what must be done to the piping?

Before backfilling trenches, what must be done to the piping?

• A. Closed. Inspected, tested and approved
• B. Unopened. Inspected, tested and approved
• C. Open. Inspected, tested and accepted
• D. Open. Inspected, tested and approved

Answer: (D)

The main idea here is that piping must be exposed and tested before you cover it up. Leaving the piping open so inspectors can access it allows you to perform the required checks—inspecting joints, verifying alignment, and conducting a pressure or leak test as mandated. The system must be inspected, tested, and approved by the authority having jurisdiction before backfilling. This ensures there are no hidden defects that could leak or fail once buried. Once it passes and receives approval, backfilling can proceed.

The main idea here is that piping must be exposed and tested before you cover it up. Leaving the piping open so inspectors can access it allows you to perform the required checks—inspecting joints, verifying alignment, and conducting a pressure or leak test as mandated. The system must be inspected, tested, and approved by the authority having jurisdiction before backfilling. This ensures there are no hidden defects that could leak or fail once buried. Once it passes and receives approval, backfilling can proceed.