Fire extinguishers are one of the most common pieces of emergency equipment in a workplace. They are easy to overlook during a normal workday, but when a small fire starts, a properly selected, accessible, inspected, and clearly labelled extinguisher can make a major difference.
Fire extinguishers are not a replacement for emergency planning, evacuation procedures, fire alarms, or calling emergency services. They are intended for small, early-stage fires and should only be used by workers who are trained, confident, and able to do so safely.
Fire Extinguishers: Know When Not to Fight a Fire
The first rule of fire extinguisher safety is knowing when to leave. Do not try to fight a fire if you do not know what is burning, do not know which extinguisher to use, have not been trained, the fire is spreading, smoke is building, your exit route is not clear, or your instincts tell you the situation is unsafe.
If the fire cannot be handled safely with the extinguisher available, activate the alarm, evacuate the area, and call emergency services. No piece of equipment is more important than getting people out safely.
Fire Extinguishers and Fire Classes Matter
Not all fires are the same. Fire extinguishers are rated for specific fire classes, and using the wrong type can be ineffective or dangerous. Common fire classes include:
Class A: Ordinary combustibles such as wood, paper, cloth, rubber, and many plastics.
Class B: Flammable liquids and gases such as gasoline, oil, paint, solvents, and similar materials.
Class C: Energized electrical equipment such as motors, appliances, panels, cords, and power tools.
Class D: Combustible metals such as magnesium, titanium, sodium, or potassium.
Class K: Cooking oils and fats, commonly found in commercial kitchens.
Many workplaces use multipurpose ABC dry chemical fire extinguishers because they are rated for Class A, B, and C fires. However, specialized areas may need different extinguishers. For example, a commercial kitchen may require a Class K extinguisher, and areas with combustible metals may require a Class D extinguisher suitable for the specific metal hazard.
Fire Extinguishers and the PASS Method
When a trained worker decides it is safe to use an extinguisher, the PASS method is a simple way to remember the basic steps:
Pull the pin.
Aim the nozzle or hose at the base of the fire where it is safe and appropriate to do so.
Squeeze the handle to discharge the extinguishing agent.
Sweep from side to side until the fire is out.
Always keep yourself between the fire and your exit route. Never let the fire block your way out. If the fire grows, smoke increases, or the extinguisher is not controlling the fire, leave immediately.
Monthly Fire Extinguishers Inspection Checklist
Fire extinguishers should be visually inspected at least monthly. The inspection should be documented, and any extinguisher that appears damaged, discharged, blocked, missing, or out of service should be reported and corrected right away.
A basic monthly fire extinguisher inspection should include checking that:<li>The extinguisher is in its designated location.
The extinguisher is visible and easy to access.
The fire extinguisher sign or location marker is clear.
The operating instructions are facing outward and readable.
The class markings are visible.
The pressure gauge is in the acceptable range, where applicable.
The pin is in place.
The tamper seal is intact.
The hose, nozzle, handle, and cylinder are not damaged.
There are no signs of corrosion, leakage, dents, or tampering.
The inspection tag or label is present and up to date.
Fire Extinguishers Inspection Tags and Labels
Fire extinguisher tags and labels help show that inspections, servicing, recharging, and maintenance have been completed. A clear tag makes it easier for supervisors, workers, safety representatives, and inspectors to confirm whether the extinguisher has been checked.
Labels and tags should be durable, legible, and attached in a way that does not interfere with the extinguisher’s operation or instructions. For workplaces that perform routine safety checks, clear inspection tags can help maintain accountability and prevent missed inspections.
Annual Service and Maintenance
Monthly visual inspections do not replace required service and maintenance. Fire extinguishers must be maintained in a fully charged and operable condition, and they should be serviced by trained and qualified persons with the proper equipment and facilities.</p>
Annual service is important because a deeper inspection may identify issues that are not obvious during a quick monthly check. This can include internal condition, recharge needs, hydrostatic testing requirements, physical damage, corrosion, or other conditions that could prevent the extinguisher from working properly in an emergency.</p>
For additional information on portable fire extinguishers, visit the https://www.ccohs.ca/oshanswers/safety_haz/fire_extinguishers.html
Remove Damaged Fire Extinguishers from Service
A damaged extinguisher should not be ignored. Remove an extinguisher from service if it has damaged cylinder or shell threads, corrosion with pitting, fire damage, missing parts, signs of tampering, loss of pressure, or any other condition that may prevent safe operation.
When in doubt, contact the supplier, manufacturer, certified service provider, or the authority having jurisdiction for guidance. Never assume a questionable extinguisher will work when needed.
Fire Extinguishers Safety Tips for the Workplace
Train workers before expecting them to use a fire extinguisher.
Keep extinguishers visible, accessible, and unobstructed.
Match the extinguisher type to the fire hazards in the area.
Keep operating instructions facing outward.
Use clear signage so extinguishers can be found quickly.
Document monthly inspections.
Arrange annual service by qualified personnel.
Replace or service extinguishers that are damaged, discharged, expired, or questionable.
Additional Fire Extinguishers Resources
For more information about fire extinguishers, inspection, maintenance, and workplace fire prevention, review https://www.ccohs.ca/oshanswers/safety_haz/fire_extinguishers.html, www.nfpa.org
Final Reminder
Fire extinguishers are a small part of a much bigger fire safety program. They work best when they are properly selected, correctly located, inspected, labelled, maintained, and supported by worker training.
If your workplace uses fire extinguishers, make sure they are easy to find, easy to identify, and ready to use. A blocked, damaged, discharged, or unlabeled extinguisher can create a serious problem during an emergency.
Need fire extinguisher inspection tags, safety labels, or workplace signage? SFTY can help support your workplace safety program with clear, practical safety identification products.
Frequently Asked Questions About Fire Extinguishers
How often should fire extinguishers be inspected?
Fire extinguishers should be visually inspected at least monthly and serviced at least annually, or sooner if an inspection shows a problem. Always follow your local fire code, manufacturer instructions, and authority having jurisdiction.
What does PASS stand for?
PASS stands for Pull, Aim, Squeeze, and Sweep. It is a simple reminder for the basic steps used when operating a portable fire extinguisher.
Can anyone use a fire extinguisher?
Only trained and confident workers should attempt to use a fire extinguisher. If the fire is spreading, the wrong extinguisher is available, smoke is building, or the exit route is not clear, evacuate and call emergency services.
What type of fire extinguisher is common in workplaces?
Many workplaces use multipurpose ABC dry chemical extinguishers because they are rated for ordinary combustibles, flammable liquids, and energized electrical equipment. Some areas, such as commercial kitchens or metal work areas, may require specialized extinguishers.