What is the maximum time the air supply must be able to refill the system?

The correct answer states that the maximum time the air supply must be able to refill the system is 30 minutes. This is significant because it aligns with industry standards and best practices for ensuring that systems relying on compressed air remain effective in delivering the necessary pressure for operation.

A 30-minute refill time allows for adequate response in various scenarios, such as firefighting or other emergencies where a water-based system must activate quickly and reliably. The standard ensures that the air storage is managed effectively to support continuous operational readiness, providing a margin of safety.

This time frame is also critical when conducting maintenance and inspection of water-based systems. It addresses concerns about the reliability and performance of the system under pressure, making sure that it can restore itself to the required operational pressure without excessive delay.

While shorter timeframes might seem appealing, they may not provide sufficient resiliency for more extensive systems in critical applications. Thus, 30 minutes is established as the viable maximum to ensure reliability and safety are prioritized in system operation.