According to NFPA 25, how frequently should a complete inspection of the sprinkler system be performed?

NFPA 25 outlines the inspection, testing, and maintenance requirements for water-based fire protection systems, including sprinklers. According to this standard, a complete inspection of the sprinkler system must be conducted at least once every year. This annual inspection is essential to ensure that all components of the sprinkler system are functional and meet the necessary standards for fire safety.

Regular inspections help identify potential issues such as corrosion, mechanical damage, or obstructions in the sprinkler system, ensuring reliable operation in the event of a fire. Following NFPA 25 guidance creates a systematic approach to maintaining fire protection systems and minimizing the risk of failure during an emergency.

The alternatives provided reflect different intervals that do not align with the NFPA 25 directive, highlighting the importance of adhering to the established annual inspection schedule.