How do you tell the position of a plug or ball valve?

• A. If handle is in line with the pipe
• B. If handle is perpendicular to the pipe
• C. If the valve is actively moving
• D. If the handle is colored red

Answer: (A)

Position is shown by the handle’s orientation relative to the pipe. When the handle runs in line with the pipe, the bore aligns with the flow and the valve is open. When the handle is perpendicular to the pipe, the bore is blocked and the valve is closed. Movement of the handle means the valve is in transit and its position isn’t settled yet, so don’t rely on movement to determine open or closed. Color alone isn’t a reliable indicator of position. Use the handle alignment to confirm whether the valve is open or closed, and follow standard operational checks if you’re unsure.