How To Recharge A Fire Extinguisher: Step-by-Step Guide

In moments of crisis, a well-maintained fire extinguisher can be a lifesaver. However, a fire extinguisher is only as effective as its charge. What good is an empty extinguisher to anyone? 

So, how to recharge a fire extinguisher? Can you do it at home?  

Recharging a fire extinguisher involves several important steps, including Assessment, Safety Precautions, Emptying the Extinguisher, Inspecting and Servicing, etc. You should take an expert’s help on this matter instead of trying DIY. 

I’ll ensure you’re equipped with the knowledge to handle this essential task. So, grab your protective gear, and let’s know how to do it.

Step-by-Step Guide to Recharge a Fire Extinguisher

fire extinguisher recharge

After using a fire extinguisher or if its pressure gauge indicates a low charge, it’s essential to recharge it to ensure it’s ready for future use. Below is a step-by-step guide on how to recharge a fire extinguisher safely and effectively.

Step-1: Gather the Necessary Supplies

Before you start, gather all the supplies you’ll need for the recharge process. This includes a fire extinguisher recharge kit, which contains a recharge hose, a compatible extinguisher agent (dry chemical, foam, etc.), safety gloves, safety goggles, and a scale to measure the extinguisher weight accurately.

Step-2: Check the Extinguisher Type and Agent

Identify the type of fire extinguisher you have (e.g., ABC dry chemical, foam, CO2). Ensure you have the appropriate recharge agent that matches the extinguisher type. Mixing different agents can be dangerous and ineffective.

Step-3: Safety Precautions

Safety is paramount during this process. Wear safety gloves and goggles to protect yourself from chemicals and potential hazards. Work in a well-ventilated area to avoid inhaling any fumes.

Step-4: Depressurize the Extinguisher

First, release the pressure from the fire extinguisher by activating the discharge lever or valve. This step is crucial as it ensures you’re working with a depressurized extinguisher.

Step-5: Disassemble the Extinguisher

Carefully dismantle the extinguisher to access the agent inside. This may involve removing the head or valve from the cylinder. Follow the manufacturer’s instructions for disassembly, as different extinguishers may have varying designs.

Step-6: Empty the Extinguisher

In a controlled manner, empty the remaining contents of the extinguisher into a safe container. You can use a scale to measure the extinguisher’s weight before and during the emptying process to ensure you remove all the agents.

Step-7: Clean and Inspect Components

Thoroughly clean all parts of the extinguisher with water to remove any residue or buildup. Inspect each component for damage or wear, and replace any faulty parts.

Step-8: Add the Recharge Agent

Using the recharge hose, carefully pour the appropriate amount of recharge agent into the extinguisher cylinder. Refer to the manufacturer’s guidelines or the agent packaging for the correct quantity.

Step-9: Reassemble and Pressurize the Extinguisher

Put all the components back together and make sure they are tightly secured. Double-check that the valve or head is correctly attached to the cylinder. Using a suitable pressurizing device, recharge the extinguisher to the recommended pressure level indicated on the pressure gauge.

Step-10: Perform a Leak Test and Reinstall

Check for any potential leaks by conducting a leak test. Submerge the extinguisher in the water and look for bubbles, which would indicate a leak.

Once you’re confident the extinguisher is correctly recharged and has no leaks, reinstall the safety pin and tag. The tag should indicate the recharge date and the type of agent used.

When to Do A Fire Extinguisher Recharge?

Fire extinguisher recharge should be done in the following situations:

  • After Use: Whenever a fire extinguisher has been discharged, it should be recharged immediately to restore its full operational capacity.
  • Pressure Loss: If the pressure gauge on the fire extinguisher falls into the red zone or indicates a pressure below the recommended level, it needs to be recharged.
  • Routine Maintenance: Regular inspections and maintenance checks should be conducted according to the manufacturer’s guidelines. If, during these inspections, it is determined that the fire extinguisher’s pressure is low or the extinguishing agent is outdated, a recharge is necessary.
  • Expiration Date: Fire extinguishers have an expiration date. If the extinguisher has reached or surpassed its expiration date, it should be recharged or replaced.
  • Inspection Requirements: Compliance with local regulations and standards may require periodic recharging of fire extinguishers, even if they haven’t been used.

Can I Recharge My Fire Extinguisher Myself?

Recharging fire extinguishers: expert guidelines should always be followed when contemplating a DIY recharge. Without proper knowledge and equipment, attempting to recharge a fire extinguisher can lead to severe consequences, as the wrong pressure or extinguishing agent may be used. It is crucial to contact a professional fire equipment service provider to ensure your fire extinguisher is correctly recharged for optimal performance and safety.

Avoid DIY Fire Extinguisher Recharge: Why?

While understanding the process of recharging a fire extinguisher can be informative, attempting a DIY recharge is not recommended for several reasons:

  • Safety Risks: Fire extinguishers contain pressurized contents that can be hazardous if mishandled. DIY recharging without proper knowledge and equipment may lead to accidents, such as injury from released pressure or exposure to extinguishing agents.
  • Incorrect Recharge: Different types of fire extinguishers require specific recharge procedures and extinguishing agents. Without proper training and access to the correct recharge kits, it is difficult to ensure the extinguisher is properly recharged to meet safety standards.
  • Warranty and Liability: Fire extinguishers often come with warranties that may be voided if unauthorized maintenance or recharging is performed. Additionally, in the event of a fire incident, liability issues may arise if the extinguisher is not professionally recharged.
  • Compliance with Regulations: Fire safety regulations and standards vary by jurisdiction. Professional fire equipment service providers are knowledgeable about local regulations and can ensure compliance during the recharge process.


Recharging a fire extinguisher is a crucial task that should be handled by trained professionals or authorized fire equipment service providers. 

While understanding the process of recharge can be informative, you may avoid DYI unless you are well-trained in it.