In a wet pipe system, how often should the main drain valve be tested?

In a wet pipe system, the main drain valve should be tested annually to ensure that the system is functioning properly and that no obstructions or leaks are present in the piping. This annual testing is crucial as it verifies that the water supply can be effectively drained and recharged, maintaining the intended operational readiness of the fire protection system.

Routine testing of the main drain helps in identifying any potential issues that could compromise the system’s effectiveness during an emergency. It also ensures compliance with NFPA (National Fire Protection Association) regulations, which mandate regular inspections and testing of fire protection systems. By adhering to the annual testing requirement, facility managers can ensure that their wet pipe sprinkler systems will operate correctly when needed, providing reliable fire protection.