After the two-year fire suppression system test, what must be done to the foam system?

After the two-year fire suppression system test, what must be done to the foam system?

• A. Inspected only
• B. Shut down permanently
• C. Drained and flushed with water
• D. Refilled with foam concentrate

Answer: (C)

After a two-year fire suppression system test, the foam system should be drained and flushed with water. This removes any old or degraded foam concentrate and rinse residues that could foul nozzles, proportioners, or piping, ensuring the foam solution will perform correctly the next time the system is used. Merely inspecting the system doesn’t remove these residues, and shutting it down permanently isn’t appropriate for ongoing operations. Refilling with foam concentrate without first flushing could reintroduce contaminants, so the required action is to drain and wash out the system with water before any recharge.

After a two-year fire suppression system test, the foam system should be drained and flushed with water. This removes any old or degraded foam concentrate and rinse residues that could foul nozzles, proportioners, or piping, ensuring the foam solution will perform correctly the next time the system is used. Merely inspecting the system doesn’t remove these residues, and shutting it down permanently isn’t appropriate for ongoing operations. Refilling with foam concentrate without first flushing could reintroduce contaminants, so the required action is to drain and wash out the system with water before any recharge.