Indicating valves must close within what timeframe?

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Multiple Choice

Indicating valves must close within what timeframe?

Indicating valves are designed to shut off water flow quickly and clearly show the valve’s position. For low-rise residential systems, it’s important to isolate the system fast to minimize water damage and keep the rest of the system functioning. NFPA 13R requires indicating valves to close within 5 seconds after actuation, so the water is stopped promptly and the valve’s closed state is confirmed by the indicator. The other timeframes aren’t consistent with that requirement: 30 seconds is too slow for rapid isolation, 10 seconds isn’t the specified limit, and saying the closing time isn’t specified contradicts the standard. So, the correct timeframe is under 5 seconds.

Indicating valves are designed to shut off water flow quickly and clearly show the valve’s position. For low-rise residential systems, it’s important to isolate the system fast to minimize water damage and keep the rest of the system functioning. NFPA 13R requires indicating valves to close within 5 seconds after actuation, so the water is stopped promptly and the valve’s closed state is confirmed by the indicator. The other timeframes aren’t consistent with that requirement: 30 seconds is too slow for rapid isolation, 10 seconds isn’t the specified limit, and saying the closing time isn’t specified contradicts the standard. So, the correct timeframe is under 5 seconds.

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