When someone operates a fire extinguisher, there is a lot going on inside that canister, including controlled chemical reactions and mechanical movement. It can get complicated, but whether you’re the curious type or not, it’s worth understanding how an extinguisher works, as it could help you make better decisions in the event of a disaster. There are many different types of extinguishers, which are designed to put out varying fires — and using the wrong one could worsen a fire. Here’s a general overview of how to use a water fire extinguisher and how it works.

Operating Fire Safety Equipment

Most fire extinguishers are cylindrical canisters sealed by a ring or pin to prevent accidental operation. To use the extinguisher, you must first remove this pin. Then you can squeeze the handle, which allows the release of pressurized water through a plastic tube and nozzle assembly. If an extinguisher doesn’t have a ring or pin, replace it immediately, as it might have already been depleted by prior use.

The Chemical Reaction

Once you squeeze the handle of a water fire extinguisher, a valve within the canister quickly releases a pressurized gas, which forces water downwards and through a tube at a high velocity. Water fire extinguishers are only safe to use on class “A” fires, which are primarily fueled by combustible materials such as wood and paper. They should never be used on class “B” or “C” fires, which are fueled by flammable liquids — e.g., oil, grease — and electricity. In the case of class “B” fires, water can splatter the oil, spreading the fire; and, in case of class “C” fires, water can cause an electrical shock.

Periodically familiarizing yourself with how fire extinguishers work can help you respond faster to emergencies and even save a life. If you need commercial fire suppression equipment for your business, get in touch with Fire Protection Specialists in Bangor, WI, at (800) 658-9463 for questions. They’re also available for fire safety maintenance and more — visit them online for more information.