A fire extinguisher is crucial safety equipment in the home, workplace, and other public spaces. It's the first line of defense against the hazardous and destructive force of fire.
Fire extinguishers are commonly categorized into four classes based on the types of fire they're most suitable for combating: Class A for ordinary combustibles, Class B for flammable liquids, Class C for electrical equipment, and Class D for combustible metals.
Fire extinguishers consist of a pressure vessel that holds an extinguishing agent, which is expelled through a nozzle or hose and can be directed at the source of the fire.
Portable fire extinguishers are most effective if used early on, when the fire is still small, and before it spreads to other areas.
Fire extinguishers must be inspected, tested, and possibly recharged by a professional at least every year, although most extinguishers will have expiration dates and need to be replaced.
Fire extinguishers are considered pressure vessels and must be manufactured following specific standards for design, material, manufacture, assembly, and hydrostatic pressure tests.
All fire extinguishers must display information labels that list the contents, the UL or FM listing, the manufacturer, and the production date.
The most common type of Fire extinguisher is a dry chemical extinguisher, which uses a mix of ammonium phosphate and sodium bicarbonate to smother the fire.
Fire extinguishers come in portable and wheeled varieties. The wheeled ones are larger, have longer hoses, and are generally used in garages and commercial buildings.
Fire extinguishers should be mounted and stored near areas with potential fire risk and within one second of reaching the fire.
Fire extinguishers must be kept in good repair at all times. Check the extinguishers monthly and replace any that show signs of wear.
