PIV stands for what in fire protection terminology?

• A. Pressure Indicator Valve
• B. Pipe Indicator Valve
• C. Post Indicator Valve
• D. Post Isolation Valve

Answer: (C)

PIV stands for Post Indicator Valve. This is a valve used to isolate the water supply for sprinkler or standpipe systems, mounted on a vertical post with a visible indicator that shows whether the valve is open or closed. The indicator is connected to the valve’s internal mechanism, so as the valve moves, the indicator reveals the current position. This allows firefighters or inspectors to quickly confirm if water can flow to the system without needing to open the valve themselves.

These valves are commonly located on exterior mains near the street or in a valve room adjacent to the riser, making the status easy to read from outside or at a glance at the scene. The other terms aren’t the standard name for this device, and a generic Post Isolation Valve would not convey the essential feature—the visible position indicator that tells you whether the system is open or closed.