In large facilities, which valve type opens and closes the water supply?

In large facilities, which valve type opens and closes the water supply?

• A. Gate Valve
• B. Ball Valve
• C. Globe Valve
• D. Post Indicator

Answer: (D)

In large water mains, you want a valve that not only shuts off the supply but also clearly shows whether it’s open or closed. A post indicator valve is designed for this purpose: it sits on the main with a vertical indicator post that shows the valve’s position above ground, so operators can quickly confirm status and operate the shut-off as needed. While gate, ball, and globe valves can control flow, they don’t inherently provide a visible, readily accessible indication of whether the valve is open or closed, which is crucial for large facilities. That built-in status indication is what makes the post indicator valve the best choice here.

In large water mains, you want a valve that not only shuts off the supply but also clearly shows whether it’s open or closed. A post indicator valve is designed for this purpose: it sits on the main with a vertical indicator post that shows the valve’s position above ground, so operators can quickly confirm status and operate the shut-off as needed. While gate, ball, and globe valves can control flow, they don’t inherently provide a visible, readily accessible indication of whether the valve is open or closed, which is crucial for large facilities. That built-in status indication is what makes the post indicator valve the best choice here.