How to Use a Fire Extinguisher Correctly

A fire extinguisher can stop a small fire before it spreads, but only when the extinguisher matches the fuel and the person using it has a clear escape route. The wrong agent can make a fire worse, while smoke, heat and rapidly changing conditions can make even a small incident dangerous within seconds.

For Australian households, workplaces and vehicles, the safest approach is simple: raise the alarm, call Triple Zero (000), move people away from danger and use an extinguisher only if the fire is in its early stages. Knowing the equipment before an emergency makes it easier to act calmly, whether you are in a suburban kitchen, a Queensland shed or a campervan on the road.

Check The Fire And Your Escape Route

Before picking up an extinguisher, identify what is burning. A rubbish bin, cardboard box or timber table involves ordinary combustible materials. A deep fryer contains hot cooking oil, while a switchboard or appliance may still be carrying electricity. These fires require different extinguishing agents.

Stand with your back toward a clear exit, not in a position where flames could cut you off. Keep other people behind you, ask someone to call 000 and avoid opening doors unnecessarily. If smoke is building, the fire is spreading, or the room is becoming hot, leave immediately. Fire and Rescue NSW, Fire Rescue Victoria and other Australian services consistently prioritise evacuation over property protection.

A portable extinguisher is intended for a small, contained fire. It is not suitable for a burning gas cylinder, a ceiling fire, a large shed fire or flames that have already reached curtains and cabinets. Close doors as you leave if it can be done safely, stay outside and never re-enter for phones, pets or belongings.

Match The Extinguisher To The Fuel

Water extinguishers are designed for Class A materials such as paper, wood, fabric and many plastics. Never use water on cooking oil, petrol, solvents or energised electrical equipment. Water can spread burning oil and may create an electric shock hazard.

Foam extinguishers can handle many Class A fires and some flammable-liquid fires, subject to the label. Dry chemical powder is widely used in Australian homes, garages and vehicles because it can tackle several fire types, including flammable liquids and some electrical equipment. It can, however, reduce visibility, contaminate electronics and leave a difficult-to-clean residue.

Carbon dioxide, commonly called CO₂, is useful for some electrical and flammable-liquid fires because it leaves little residue. It has limited cooling ability, so a fire may reignite. Wet chemical extinguishers are made for cooking oils and fats, particularly commercial kitchens. A fire blanket may be suitable for a small pan fire, but it must fully cover the pan and should never be thrown onto the flames.

Use The PASS Method Carefully

For a suitable extinguisher, remove it from its bracket and check the pressure indicator if one is fitted. Pull the safety pin or remove the tamper seal, keeping the nozzle pointed away from people. Hold the extinguisher upright and test it briefly in a safe direction if the instructions allow.

Aim low at the base of the flames, not at the smoke or the top of the fire. Squeeze the handle steadily, then sweep the nozzle from side to side across the burning material. This familiar PASS method means pull, aim, squeeze and sweep. Keep several metres away at first and move closer only when the fire is clearly shrinking.

Watch for flare-ups and stop if the extinguisher empties without controlling the fire. Do not turn your back while leaving. Even after flames disappear, hot materials can reignite, so remain at a safe distance until emergency services arrive. A used extinguisher must be replaced or professionally recharged, even if only a small amount was discharged.

Avoid Electrical And Outdoor Fire Mistakes

Switch off power only if the switch is safely accessible and you do not need to approach the fire. Do not touch a damaged appliance, exposed cable or wet electrical area. In homes with solar panels, battery storage or a smart meter, electricity may remain present even after a main switch is turned off. General explanations of smart grid systems can help explain how connected energy networks operate, but they do not replace advice from emergency services or a licensed electrician.

Outdoor conditions create additional hazards. A grass fire can move quickly in hot, windy weather, especially during an Australian fire danger period. A small extinguisher is rarely an answer to flames in dry scrub, mulch or a paddock. Follow warnings from the Country Fire Authority in Victoria, the NSW Rural Fire Service or the relevant state agency, and leave early when authorities advise evacuation.

In a barbecue area, turn off the gas supply only if it is safe and never move a burning cylinder. For a small gas flame, shutting off the supply may stop the fuel, but a leaking or heated cylinder requires immediate retreat and emergency assistance. Keep children, pets and bystanders well away, and do not rely on a garden hose for oil, fuel or electrical fires.

Maintain Equipment And Practise Beforehand

Choose an extinguisher based on the likely hazards in each location. A kitchen may need a fire blanket and wet chemical or suitable dry chemical unit. A garage can contain fuel, paint, batteries and tools, so check the extinguisher label carefully. A vehicle extinguisher should be securely mounted where it can be reached without entering a burning vehicle.

Look for corrosion, damage, blocked nozzles, missing pins and an unreadable label. Do not paint over instructions or store the unit where heat, rain or chemicals can damage it. In Australia, products and servicing should align with relevant standards and the manufacturer’s instructions; businesses may also need documented inspection and maintenance arrangements under workplace safety requirements.

A short household drill can cover who calls 000, where everyone gathers and how to leave safely. Practise identifying the pin and handle without discharging the unit. Residents in bushfire-prone areas should also prepare an evacuation plan, monitor official alerts and keep access roads clear rather than treating a small extinguisher as their main bushfire defence.

Choosing Equipment For Common Situations

Situation	Suitable option	Important limitation
Paper, timber or fabric	Water or foam	Do not use on live electrical equipment
Cooking oil or fat	Wet chemical extinguisher or fire blanket	Never pour water onto the pan
Computer or switchboard fire	CO₂ or suitable dry chemical powder	Power may remain live; evacuate if unsafe
Petrol, paint or solvent	Foam or dry chemical powder	Vapours can spread and reignite
Small vehicle fire	Dry chemical powder	Leave the vehicle if flames spread or smoke increases
Grass or scrub fire	Usually not a portable extinguisher	Follow local bushfire warnings and evacuate

Practical Safety Checks

• Keep an extinguisher visible, accessible and securely mounted.
• Read the label and identify which fire classes it covers.
• Store kitchen equipment away from the stove, oven and likely splash zones.
• Call 000 before attempting to control a fire.
• Keep an unobstructed exit behind you at all times.
• Replace, recharge or service any extinguisher that has been discharged or damaged.
• Follow CFA, RFS, Fire and Rescue NSW or local fire service advice during fire danger periods.

A fire extinguisher is a useful first-response tool, not a substitute for smoke alarms, evacuation planning or professional firefighting. Learn the equipment in your home, workplace or vehicle, keep emergency numbers accessible and act early when a fire is small and your escape remains clear. When conditions change, leave immediately and let trained firefighters take over.