The air supply for a dry system must restore normal air pressure within how many minutes?

The appropriate standard for restoring normal air pressure in a dry sprinkler system is set at 30 minutes. This time frame is critical to ensure that the system can return to a ready state swiftly after discharge, enabling it to function effectively in the event of a fire. Quick restoration of air pressure is vital for maintaining the integrity of the system and ensuring that the dry pipe valve can reactivate properly for future fire suppression activities.

Maintaining the correct air pressure is crucial as it helps to prevent water from prematurely entering the system, which is particularly important in environments where temperatures can drop below freezing. Ensuring that this system is quickly restored to its operational parameters within 30 minutes can significantly enhance safety and reliability.