wet chemical fire extinguisher

Wet Chemical Fire Extinguishers

Wet Chemical fire extinguishers carry a bright YELLOW label. They are designed for use in commercial kitchens where there is a risk of cooking oil and fat fires. They work by forming a layer of foam on the surface that starves the fire of oxygen.

Designed for Cooking Oils and Fats – Class F

Wet Chemical fire extinguishers are suitable for fires caused by:

  • cooking oils
  • cooking fats
  • waste bins
  • laboratories

Wet Chemical fire extinguishers can be used on Class A fires, but we recommended you have specific water fire extinguishers.

How Wet Chemical Fire Extinguishers work

Wet Chemical fire extinguishers are filled with a solution of potassium acetate. They operate in the same two ways as foam extinguishers. Firstly, the solution is expelled as a fine mist which has a cooling effect on the surface of the burning liquid, reducing its temperature. The potassium reacts with the burning liquid to create a foam that prevents oxygen from reaching the flammable vapour. This ultimately extinguishes the fire by starving the fire of fuel.

Types of business that require Wet Chemical Fire Extinguishers

Wet Chemical fire extinguishers are required for the following types of businesses:

  • hospitals and residential care homes
  • hotels, restaurants, public houses and canteens
  • schools, independent schools, colleges, universities, halls of residence
  • clubhouses, cinemas and entertainment venues

Locate and store

Wet Chemical fire extinguishers should be located next to the source of the fire risk.


Fire Risk Assessment

If your business has five or more employees a Fire Risk Assessment is required to comply with The Regulatory Reform (Fire Safety) Order 2005. Our highly trained certified engineers can determine the chances of a fire occurring in your workplace and draft your written document.

Fire risk assessment

Out of hours support

Out Of Hours Support

Many businesses operate 24 hours a day, 7 days a week. Atlas Fire Protection provide out of hours support to all customers with proactive maintenance contracts. One of our certified engineers will deliver a quick and reliable response to keep your business protected.


Wet Chemical Extinguishers

YELLOW label


Fire Extinguisher Sales

Atlas Fire Protection supply the highest quality fire extinguishers in the business. We stock the best range to ensure you have the right types in the right sizes in the right locations. All our fire extinguishers are manufactured in the United Kingdom to BS EN3 standard, CE marked and guaranteed for five years.


Fire Extinguisher Commissioning

All fire extinguishers in non-domestic premises must be commissioned in accordance with BS 5306. Atlas Fire Protection are licenced to thoroughly check and install your fire extinguishers – certifying them as approved and good for use in accordance with regulations.


Fire Extinguisher Servicing

To ensure compliance with UK legislation your fire extinguishers need to be maintained in accordance with BS 5306 Part 3. Our certified engineers are highly trained and equipped with the best tools to inspect and maintain your fire extinguishers on a regular basis. Atlas Fire Protection offer proactive maintenance contracts to ensure your peace of mind.


Fire Extinguisher Refills

Our certified engineers can refill all makes and types of fire extinguishers at your premises during the working day. Atlas Fire Protection carry everything needed in our fully equipped service vans, saving you time and keeping your premises protected.