When should a fire service main be tested?

The correct answer emphasizes the importance of ensuring the reliability and functionality of fire service mains through regular testing. Fire service mains should be tested both after installation and periodically thereafter to verify that they are in proper working condition and can effectively supply water to the fire protection systems when needed.

Initial testing following installation confirms that the system was installed correctly and is functioning as intended. However, regular periodic testing is necessary to account for any changes over time that may affect the system’s performance, such as sediment build-up, physical damage, or equipment degradation. This approach ensures that the fire service main is always ready to perform efficiently during an emergency.

Other potential timing scenarios, such as testing only during initial installation, would not account for the ongoing maintenance and operational readiness required for such critical life safety systems. Suggesting testing only when there is a fire incident or every five years does not align with best practices, as both scenarios could leave gaps in ensuring consistent operation and readiness of the fire service main.