What is the maximum time for initial water discharge from the system test connection in a dry system?

The maximum time for initial water discharge from the system test connection in a dry system is 60 seconds. This duration is established to ensure that the system is functioning properly and to verify that water is available at the test connection.

The rationale behind this time limit is to provide a balance between allowing enough time for the system to operate and minimizing the risk of water damage or unintended consequences that can occur if water is allowed to discharge too long. In a dry sprinkler system, the piping is filled with air until the system is activated by a fire event, at which point the pressurized air is released, allowing water to flow into the system. Ensuring that water is discharged within this timeframe confirms that the system is ready to respond promptly during an actual fire event, demonstrating its reliability and effectiveness.

Monitoring and adhering to this maximum time is essential for compliance with codes and standards governing fire protection systems, which help ensure safety and effective performance in emergencies.