Maximum allowable time for air pressure restoration in a dry system is?

The maximum allowable time for air pressure restoration in a dry system is 30 minutes. This time frame is crucial because it ensures that the system is quickly returned to its operational state after a drop in pressure. A dry sprinkler system relies on compressed air to keep the water from entering the pipes until needed. If there is a loss of air pressure, it is important to restore it promptly to prevent any risk of water entering the system prematurely or causing damage.

In the context of fire protection systems, maintaining the correct air pressure is vital for functionality, performance, and safety. The specified time limit of 30 minutes is guided by industry standards and helps ensure that any adjustments or repairs are conducted in a timely manner, reducing the risk of system failure during an actual fire event. This not only helps in compliance with regulations but also enhances the overall reliability of the sprinkler system.