In sewer maintenance, what device is used to push debris through a force main?

In sewer maintenance, what device is used to push debris through a force main?

• A. Pig
• B. Rodding tool
• C. Suction hose
• D. Valve

Answer: (A)

When a force main needs debris moved along the pipe, a pipeline pig is used. A pig is inserted into the pressurized line and propelled downstream by the flow or an external drive, acting like a piston to push solids and sludge ahead toward a downstream outlet. This lets maintenance crews clear blockages or push material without entering the energized pipe. The other tools aren’t designed to move debris forward through a force main: a rodding tool is manual and used in gravity lines or smaller gaps, a suction hose removes material by suction rather than pushing it, and a valve simply controls flow.

When a force main needs debris moved along the pipe, a pipeline pig is used. A pig is inserted into the pressurized line and propelled downstream by the flow or an external drive, acting like a piston to push solids and sludge ahead toward a downstream outlet. This lets maintenance crews clear blockages or push material without entering the energized pipe. The other tools aren’t designed to move debris forward through a force main: a rodding tool is manual and used in gravity lines or smaller gaps, a suction hose removes material by suction rather than pushing it, and a valve simply controls flow.