How often shall CO2 containers be weighed?

• A. Semi annually
• B. Monthly
• C. Annually
• D. Weekly

Answer: (A)

CO2 extinguishers often don’t have a reliable gauge to show how much charge remains, so weighing the cylinder is the best way to verify the correct charge. A cylinder can lose CO2 slowly through small leaks or fittings, and this loss isn’t easily visible just by looking at the extinguisher. By weighing it at a set interval, you can detect any decrease in weight that would indicate a low or leaking charge before it’s needed in an emergency.

Six months strikes a practical balance: CO2 cylinders are unlikely to lose significant charge in a short time, but regular checks are still important. Monthly inspections cover external condition and seals, while annual checks are too far apart to catch gradual losses. Weighing every six months provides timely verification without being unnecessarily burdensome.

Weigh the CO2 container every six months.