When do fire extinguishers expire? Although they don't have a true "expiration date," traditional fire extinguishers generally have a 10-12 year life expectancy. Disposable (non-rechargeable) fire extinguishers should be replaced every 10 years.

The 4-digit manufacturing year can be found in a small box near the Underwriters Laboratory (UL) logo, it is usually located to the left of it. Most fire extinguishers have a life expectancy of about 10 years after manufacture. First Alert's warranty covers you from the date of purchase.

When there is an electrical fire the most suitable extinguishers to use are either the carbon dioxide or dry powder types. Foam extinguishers aren't normally suitable for putting out electrical fires, but many modern types are safe to use for incidental electrical risks.

Class C fires involve electrical equipment, such as appliances, wiring, circuit breakers and outlets. Never use water to extinguish class C fires - the risk of electrical shock is far too great! Class C extinguishers do not have a numerical rating. The C classification means the extinguishing agent is non-conductive.