How often should a fire extinguisher undergo hydrostatic testing?

Hydrostatic testing is a critical procedure for ensuring the safety and reliability of fire extinguishers, particularly for those that are pressurized. This testing is designed to check the integrity of the extinguisher's cylinder and ensure it can withstand the pressures involved without failing.

The correct answer indicates that hydrostatic testing should occur every 5 to 12 years. This interval aligns with industry standards and regulations, such as those set by the National Fire Protection Association (NFPA) and the Occupational Safety and Health Administration (OSHA). Depending on the specific type of extinguisher, the manufacturer’s recommendations, and local regulations, the precise timing may vary within that 5 to 12-year window.

Conducting this test not only ensures compliance with safety regulations but also enhances the overall effectiveness of the extinguisher in an emergency. Regular testing helps catch any defects or weaknesses in the pressure vessel before they result in catastrophic failure, thereby providing a safeguard for users.