Hydrostatic testing of extinguishers occurs every

Hydrostatic testing of extinguishers occurs every

• A. Every 5 years
• B. Every 3 years
• C. Every 7 years
• D. Every 10 years

Answer: (A)

Hydrostatic testing checks the extinguisher cylinder’s strength by pressurizing it to a level above normal service pressure to reveal hidden weaknesses like corrosion or thin walls. Because this test places high stress on the shell, it’s done only at scheduled intervals, not with every service. For most portable extinguishers, the standard interval is five years. This cadence balances safety with practicality, while other intervals such as three, seven, or ten years don’t align with typical maintenance schedules.

Hydrostatic testing checks the extinguisher cylinder’s strength by pressurizing it to a level above normal service pressure to reveal hidden weaknesses like corrosion or thin walls. Because this test places high stress on the shell, it’s done only at scheduled intervals, not with every service. For most portable extinguishers, the standard interval is five years. This cadence balances safety with practicality, while other intervals such as three, seven, or ten years don’t align with typical maintenance schedules.