What is the term for the main water control valve in an automatic sprinkler system that provides a visual indication?

• A. Indicating Valve
• B. Main Valve
• C. Isolation Valve
• D. Control Valve

Answer: (A)

The main idea here is identifying a valve at the sprinkler system’s primary water supply that not only shuts off the flow but also shows its status visually. This is called an indicating valve, because the key feature is the visible indication of whether the valve is open or closed. That visual cue is essential for quickly confirming if the system is pressurized and ready to deliver water, which is why it’s distinguished from other valve terms. A main valve is a general term for the primary shutoff, an isolation valve emphasizes the ability to shut off flow for maintenance without implying visual status, and a control valve describes a device that regulates flow but not necessarily its position shown at a glance. So the indicating valve is the best fit since its defining characteristic is the visual indication of the valve’s position.