How often must a dry pipe valve be tested for proper operation under NFPA 25?

The requirement stated in NFPA 25 for the testing of dry pipe valves specifies that these valves must be tested annually to ensure they are functioning properly. This annual testing is critical to maintaining the reliability and effectiveness of the fire protection system. During the test, the system is pressurized, and the operation of the valve is verified to ensure that it will perform as expected in the event of a fire. Regular testing is essential not only to comply with safety regulations but also to prevent potential failures that could jeopardize the safety of the building and its occupants.

The other timeframes offered do not align with the established standards in NFPA 25, as they either suggest a frequency that is too rare or extend beyond the necessary maintenance intervals required for fire protection systems.