What is the frequency for hydrostatic testing of CO₂ extinguishers?

Hydrostatic testing of CO₂ extinguishers is mandated every five years. This testing is essential to ensure the structural integrity and safety of the extinguisher, which is subject to high pressure. Over time, changes in temperature, humidity, and the operational environment can affect the capabilities and safety of the extinguisher’s cylinder. The five-year interval is a standard industry practice designed to detect any weaknesses or potential failures in the cylinder before they become serious hazards.

Other intervals mentioned, such as three years or ten years, do not align with established guidelines for CO₂ extinguishers specifically, as they are designed to ensure timely maintenance and safety. Annual inspections are typically required but do not replace the need for the five-year hydrostatic testing.