Fire extinguishers are a vital part of fire safety in homes, workplaces, vehicles, and public buildings. But despite their widespread presence, many people aren’t fully aware of the different types of extinguishers, what kinds of fires they’re suitable for, or how to properly maintain them.
In this guide from Hartson Fire, we’ll break down everything you need to know—so you’re better prepared to prevent a small fire from becoming a devastating one.
🔥 Why Fire Extinguishers Matter
In the event of a fire, a fire extinguisher can mean the difference between a minor incident and a major catastrophe. When used correctly, it can stop flames in their tracks—giving people time to evacuate safely and minimising property damage.
But not all extinguishers are created equal. Using the wrong type can be ineffective—or even dangerous.
🧯 Types of Fire Extinguishers
Fire extinguishers are classified by the type of fire they are designed to combat. In the UK and many other regions, fires are categorised into classes:
Class A: Fires involving solid materials such as wood, paper, or textiles.
Class B: Fires involving flammable liquids like petrol, paint, or alcohol.
Class C: Fires involving gases such as propane or butane.
Class D: Fires involving metals like magnesium or lithium.
Class F: Fires involving cooking oils and fats.
Electrical Fires : While not given a letter, special attention is paid to fires caused by live electrical equipment.
1. Water Extinguishers
· Best for: Class A fires
· Do NOT use on: Class B, C, D, or electrical fires
· Common use: Offices, schools, public buildings
2. Foam Extinguishers
· Best for: Class A and B fires
· Do NOT use on: Electrical fires unless specified
· Common use: Petrol stations, garages, workshops
3. CO₂ (Carbon Dioxide) Extinguishers
· Best for: Electrical fires and Class B
· Do NOT use on: Class A fires
· Common use: Server rooms, offices, electronics-heavy environments
4. Dry Powder Extinguishers
· Best for: Class A, B, and C fires (some types also cover Class D)
· Common use: Industrial areas, vehicles, workshops
· Caution: Can impair visibility and breathing in confined spaces
5. Wet Chemical Extinguishers
· Best for: Class F fires (cooking oils and fats)
· Also effective on: Class A fires
· Common use: Commercial kitchens, restaurants
🛠️ How to Use a Fire Extinguisher: The PASS Method
Using a fire extinguisher is straightforward—if you remember the PASS method:
P – Pull the pin
A – Aim the nozzle at the base of the fire
S – Squeeze the handle
S – Sweep the nozzle from side to side
Only attempt to fight a fire if it’s small, contained, and you have a clear escape route.
🔧 Fire Extinguisher Maintenance and Servicing
Proper servicing is essential to ensure extinguishers function when needed. Here’s what’s involved:
✅ Monthly Visual Checks
Is the extinguisher in its proper location?
Is it visible and unobstructed?
Is the pressure gauge in the green zone?
Is the pin intact and tamper seal unbroken?
✅ Annual Servicing
Performed by a certified technician like Hartson Fire which is BAFE registered. this includes:
· Checking internal pressure and weight
· Inspecting for corrosion or damage
· Ensuring the correct signage and accessibility
🧠 Fire Safety Tips
· Train your team – Make sure everyone knows how to use extinguishers.
· Install the right types – Match extinguisher types to the specific fire risks in each area.
· Don’t DIY – Always hire a professional for servicing and refilling.
· Log everything – Keep a fire safety log of checks and maintenance.
Final Thoughts
Fire extinguishers are your first line of defence in an emergency. By understanding the types, correct usage, and maintenance requirements, you’ll ensure you’re ready to act quickly and safely.
If you’re unsure what type of extinguisher is right for your premises—or need professional servicing—reach out to Hartson Fire on the number below. Get in touch with our expert team today and ensure your fire safety is up to standard.
