How to Use a Fire Extinguisher Safely: Step-by-Step Guide

Imagine a small fire starts in your workplace kitchen or near an electrical socket. Do you know exactly what to do in the first thirty seconds?

Having a fire extinguisher nearby is only half the battle; knowing how to use it safely and effectively under pressure is the other half. A fire extinguisher is an invaluable tool in the initial stages of a small fire, but used incorrectly – or used on a fire that has already grown too large it can be ineffective or even dangerous.

At Kimty, we believe that safety isn’t just about having equipment on the wall, it’s about competence and confidence. This guide will walk you through the critical steps of using a portable fire extinguisher, focusing on the universally recognised P.A.S.S. method.

Disclaimer: This guide is for informational purposes. Nothing replaces hands-on, practical fire safety training.

The Crucial First Step: Decide IF You Should Fight the Fire

Before you even touch an extinguisher, you must make a split-second risk assessment. Fire spreads very rapidly. Your primary responsibility is to ensure people are safe, not to be a hero.

Do NOT try to operate a fire extinguisher if:

• The alarm hasn’t been raised: Always sound the alarm and ensure evacuation has started before attempting to fight fire.
• The fire is spreading rapidly: If the fire is already larger than a small waste bin, do not tackle it.
• You don’t have a clear escape route: Never let the fire get between you and the exit. You must always have your back to a safe exit door.
• The room is filling with smoke: Smoke is often far more deadly than the flames. If visibility is dropping or you are struggling to breathe, get out immediately.
• You are unsure about the equipment: If you don’t know if you have the right extinguisher for the type of fire, evacuate. Using water on an electrical fire or a chip pan fire, for example, will cause an explosion.
  
  

Only proceed if the fire is small, contained, you have sounded the alarm, and you have a safe escape path.

Knowing Your Equipment

Not every fire extinguisher is made to be equal. They are intended for certain fire categories. Employing the incorrect sort can be disastrous.

While we won’t cover every variation here, it is vital that you familiarise yourself with the fire protection equipment in your building before an emergency occurs. Look at the coloured band on the extinguisher and the instructional label.

Common types you might encounter include:

• Water (Red): For wood, paper, and fabrics (Class A). Never use on electrical or liquid fires.
• CO2 (Black): Primarily for electrical fires and flammable liquids (Class B).
• Foam (Cream): Good for Class A and flammable liquids (Class B).
• Dry Powder (Blue): Multi-purpose, but can reduce visibility indoors and damage equipment.
  
  

Using the wrong unit can make the situation worse. For example, using a water extinguisher on a grease fire can cause a violent explosion of burning oil. If you are unsure which extinguishers are suitable for your specific workplace risks, please request a site assessment so we can evaluate your needs.

The P.A.S.S. Technique: Your Step-by-Step Guide

If you have determined it is safe to fight the fire and you have the correct extinguisher, follow the P.A.S.S. technique. This acronym is used globally because it is easy to remember under stress.

P – Pull the Pin

Every fire extinguisher has a safety pin inserted into the handle. This pin prevents accidental discharge while the unit is being moved.

• Place the extinguisher on the floor for stability.
• Grip the handle with one hand while firmly pulling the ring pin with the other.
• It may take a solid tug to break the small plastic “tamper seal” holding the pin in place. Don’t worry about breaking the seal; that’s what it’s designed for.

Once the pin is removed, the extinguisher is live and ready to fire.

A – Aim Low (At the Base of the Fire)

This is the most common mistake people make. It is natural to want to aim at the bright, scary flames reaching upwards. However, aiming at the top of the flames does nothing to extinguish the fire.

• Pick up the extinguisher (most are designed to be held upright).
• If the extinguisher has a hose or discharge horn, grip it firmly near the end. Caution: CO2 extinguishers get extremely cold during discharge; only hold the horn where indicated to avoid freeze burns.
• Aim the nozzle or hose at the very base of the fire – the fuel source where the flames are originating. You need to smother the fuel, not fight the flames in the air.
• Stand about 2 to 3 metres (6 to 8 feet) away from the fire. If you are too close, the pressure of the discharge might spread the burning material.

S – Squeeze the Lever

To discharge the extinguishing agent, you need to squeeze the two levers at the top of the extinguisher together.

• Squeeze slowly and evenly.
• The agent will discharge rapidly. Be prepared for the noise and the recoil pressure.
• If you release the lever, the discharge will stop.

S – Sweep from Side to Side

While squeezing the lever and aiming at the base, you must cover the entire area of the fire.

• Use a sweeping motion, moving the nozzle back and forth horizontally across the base of the fire.
• As the flames appear to die down, you can slowly step closer to ensure the fire is fully extinguished, but never turn your back on it.
• Continue sweeping until the extinguisher is empty or the fire is completely out. Most portable fire extinguishers only contain enough agent for 10 to 20 seconds of continuous use.
  
  

After the Fire Is Out

Just because the flames have vanished doesn’t mean the danger has passed. Fires can easily re-ignite from hot spots or smouldering debris.

1. Back away: Back away from the fire area slowly. Never turn your back on a fire site until you are certain it is cold.
2. Evacuate: Even if you think you put it out, leave the building and close the door behind you to contain any potential re-ignition.
3. Report it: Tell the fire and rescue service exactly where the fire was and that you used an extinguisher on it.
4. Do not put it back: Never put a used or partially used extinguisher back on its wall bracket. It is now empty and useless for the next emergency. It needs to be immediately recharged or replaced by professionals.
   
   

Why Training and Maintenance Matter

Reading a guide is a great start, but muscle memory is better. The best way to ensure your staff can effectively use the P.A.S.S. method is through practical training. When people have physically handled an extinguisher and discharged it in a controlled environment, their panic response is significantly reduced during a real incident.

Furthermore, an extinguisher that hasn’t been maintained might fail when you squeeze that lever. Regular servicing isn’t just a box-ticking exercise for compliance; it ensures the unit is pressurised and the agent hasn’t compacted.