When a fire breaks out, every second matters. Reaching for the right fire extinguisher can mean the difference between a minor incident and a full-blown emergency. But not all fire extinguishers are created equal—using the wrong one can make the fire worse.
At QSSI, we emphasize the importance of knowing your extinguishers. This quick guide breaks down the main types of fire extinguishers, what they’re used for, and how to remember which one to choose in a crisis.
🧯 The 5 Common Types of Fire Extinguishers
Each extinguisher is labeled by class, depending on the type of fire it can put out. Here’s what you need to know:
🔵 Class A – For Ordinary Combustibles
Use for: Paper, wood, cloth, rubber, plastic
Extinguishing agent: Water or dry chemical
Look for: A green triangle with an “A”
Tip: Never use on grease or electrical fires!
🟡 Class B – For Flammable Liquids
Use for: Gasoline, oil, paint, solvents, grease
Extinguishing agent: Dry chemical, carbon dioxide (CO₂)
Look for: A red square with a “B”
Tip: Smother the fire, don’t spread it.
⚡ Class C – For Electrical Fires
Use for: Energized electrical equipment (wires, panels, tools)
Extinguishing agent: CO₂ or dry chemical
Look for: A blue circle with a “C”
Tip: Always cut power if safe to do so.
⚪ Class D – For Combustible Metals
Use for: Magnesium, titanium, aluminum, sodium
Extinguishing agent: Special dry powder agents
Look for: A yellow star with a “D”
Tip: These fires are rare but require a specific extinguisher.
🔴 Class K – For Kitchen Fires
Use for: Cooking oils, fats, grease in commercial kitchens
Extinguishing agent: Wet chemical
Look for: A black hexagon with a “K”
Tip: Best for restaurants and food trucks—smothers the fire and cools the surface.
💡 Quick Rule of Thumb: Match the Fire Type to the Extinguisher
If you’re unsure, check the label. Most modern extinguishers are multi-class (like ABC extinguishers) and will clearly show the types they cover.
✅ How to Use an Extinguisher: The PASS Method
Always remember PASS:
- P – Pull the pin
- A – Aim the nozzle at the base of the fire
- S – Squeeze the handle
- S – Sweep from side to side
It’s simple—but only effective if you’re using the right extinguisher for the right fire.
🚫 Using the Wrong Extinguisher Can Be Dangerous
For example, spraying water (Class A extinguisher) on a grease fire (Class B or K) can cause the flames to spread rapidly. Using the wrong type not only wastes time but can endanger lives.
🧠 Fire Safety Starts With Awareness
At QSSI, we train teams to recognize fire types, choose the correct extinguisher, and act fast under pressure. Fire extinguisher training is a key part of your safety strategy—especially for industrial, healthcare, construction, and food service environments.
📞 Need Fire Safety Training?
We offer fire extinguisher safety courses, inspection guidance, and workplace compliance audits. Whether you’re a business owner, safety officer, or team leader, QSSI helps you stay prepared and OSHA-compliant.
Visit us at https://qssisolutions.com to learn more or book a training session today.
Stay alert. Stay trained. Stay safe.