How to Use a Fire Extinguisher: The PASS Technique Explained (Step-by-Step Guide)

Introduction

Most people in Nepal have a fire extinguisher in their home, office, or shop — but have never actually used one. In an emergency, that gap between owning an extinguisher and knowing how to operate it under stress is often the difference between a contained incident and a serious fire. This guide explains exactly how to use a fire extinguisher correctly, using the internationally recognised PASS technique, along with the equally important judgment of when not to attempt firefighting at all.

1. Before You Touch the Extinguisher: Three Checks

Before attempting to use any extinguisher, perform these three checks in order. This takes only a few seconds and determines whether firefighting is even appropriate. Check 1: Is the fire small and contained? A fire extinguisher is designed for incipient-stage fires — roughly the size of a waste-paper basket or smaller. If the fire has already spread to cover a significant portion of a room, involves furniture, or has reached the ceiling, an extinguisher will not be sufficient. Check 2: Is your evacuation route clear? Never position yourself between the fire and your only exit. If you cannot retreat safely should the extinguisher fail to control the fire, do not attempt to fight it — evacuate instead. Check 3: Has the alarm been raised? Activate the nearest fire alarm or alert others before attempting to extinguish the fire. Do not assume someone else has already done this. If any of these three checks fail, evacuate immediately and call the fire brigade (Nepal Fire Service: 101) from a safe location.

2. The PASS Technique

PASS is the standard method taught internationally for operating a fire extinguisher. Each letter represents one step in sequence.

P — Pull the Pin

Every extinguisher has a safety pin through the handle that prevents accidental discharge. Pull this pin firmly, breaking the plastic tamper seal if present. This unlocks the trigger mechanism.

A — Aim Low

Point the nozzle or hose at the base of the fire, not at the flames themselves. Fire burns upward from its fuel source — extinguishing agent applied to the visible flame tips has minimal effect, while agent applied to the base directly attacks the burning material.

S — Squeeze the Handle

Squeeze the handle slowly and firmly to release the extinguishing agent. Most extinguishers discharge their full contents within 8 to 20 seconds depending on size — there is no time to waste, but a controlled, steady squeeze gives better directional control than a sudden full-force grip.

S — Sweep Side to Side

Move the nozzle in a slow, sweeping motion across the base of the fire, covering the entire width of the burning area. As the fire retreats, advance slowly while continuing the sweeping motion, maintaining a safe distance.

3. After the Fire Appears Out

Do not turn your back immediately. Continue watching the area for several minutes after flames are no longer visible. Smouldering material can re-ignite, particularly with solid fuel (Class A) fires where embers can persist beneath the visible surface. Do not re-enter a room if smoke continues to build. Even if visible flame is gone, a fire can still be producing dangerous smoke and heat. Always report the incident, even if it was successfully extinguished without injury or significant damage. This allows building management to inspect for hidden damage and replace the used extinguisher.

4. When NOT to Use a Fire Extinguisher

Knowing when to abandon firefighting is as important as knowing the PASS technique. Stop and evacuate immediately if:

• The fire is larger than the extinguisher's rated capacity — a single small extinguisher will not control a fire that has spread beyond its point of origin
• Heavy smoke is filling the room — smoke inhalation is the leading cause of fire fatalities, and visibility loss makes both firefighting and evacuation dangerous
• You have used one full extinguisher and the fire is not extinguished — do not search for a second extinguisher while the fire continues to grow; evacuate
• The fire is blocking your only exit — never fight a fire that stands between you and your escape route
• You don't know what's burning — chemical fires, gas leaks, and certain industrial materials require specialised response that a standard extinguisher cannot provide
• The fire involves a gas leak (LPG/CNG) — extinguishing visible flame without stopping the gas supply first creates an unburned, explosive gas cloud, which is more dangerous than the original fire

In all of these situations, the correct action is: evacuate, close doors behind you to slow fire spread, and call the fire brigade from a safe location.

5. Matching Extinguisher Type to Fire Type

Using the PASS technique correctly still requires using the right extinguisher for the fire in front of you: Critical safety note: Never use water or foam on an electrical fire — both conduct electricity and create a serious electrocution risk to the operator.

6. Why Practice Matters More Than Reading

Reading these steps is useful preparation, but operating an extinguisher under genuine stress — heat, noise, adrenaline, limited visibility — is a different experience entirely. This is why BolteK Enterprise's fire safety training always includes a live, supervised extinguisher discharge using a controlled training fire, not just a classroom presentation. In our experience training staff across hotels, hospitals, and offices in Kathmandu, the most common real-world mistakes are:

• Aiming at the flames instead of the base of the fire
• Standing too close (most extinguishers are effective from 2–3 metres away — closer is not better)
• Discharging the full extinguisher in one continuous burst without sweeping, missing parts of the fire's base
• Hesitating to pull the pin firmly, wasting critical seconds

Physical practice eliminates these hesitations. A person who has discharged a real extinguisher once, even in training, responds with far more confidence and accuracy than someone who has only read about the process.

Frequently Asked Questions

Q: How close should I stand when using a fire extinguisher? A: Most extinguishers are effective at a range of 2 to 3 metres. Standing too close risks the discharge force scattering burning material; standing too far reduces the agent's effectiveness in reaching the fire's base. Q: How long does a fire extinguisher last once activated? A: Most portable extinguishers discharge their full contents in 8 to 20 seconds depending on size. This is why aim and technique matter — there is no time for trial and error once discharge begins. Q: Can I reuse a fire extinguisher after a partial discharge? A: No. Once a fire extinguisher has been used, even briefly, it has lost pressure and must be professionally refilled and re-pressurised before it can be relied upon again. Treat any used extinguisher as empty. Q: What should I do if the extinguisher doesn't work? A: If the extinguisher fails to discharge or the fire does not respond after a full discharge, stop immediately and evacuate. Do not waste time troubleshooting the equipment while a fire continues to grow. Q: Where should fire extinguishers be stored in a home or office? A: Mounted on a wall bracket, 1.0–1.5 metres above the floor, near room exits and away from the fire risk itself (so you don't have to walk past the fire to reach the extinguisher). Never store extinguishers inside cupboards or behind obstructions.

Conclusion

The PASS technique is simple — pull, aim, squeeze, sweep — but its real value comes from being practised before it's ever needed in an emergency. Knowing when to fight a fire and, just as importantly, when to evacuate instead, is what separates a minor incident from a serious one. BolteK Enterprise conducts hands-on fire extinguisher training for offices, hotels, hospitals, schools, and industrial sites across Nepal, including live, supervised extinguisher discharge so your staff build genuine confidence, not just theoretical knowledge. To book hands-on fire extinguisher training for your team: +977-9766866032 | [email protected] Published by BolteK Enterprise Pvt. Ltd. — Padamsal, Tarakeshwor-2, Kathmandu, Nepal.