K Type / Wet Chemical Fire Extinguisher

Class K fires do involve flammable liquids, please be aware that Class B fire extinguishers (rated for flammable liquids such as petroleum and gases) are not efficient to handle the high-temperature cooking oil and grease fires that occur in kitchens. 

It’s also important to remember that the use of water on cooking oil and grease fires will only spread the fire since the oil is not absorbed into the water but rather transported by it. Never use water on a fire involving grease or oil. 

The Class K fire extinguishers are adequate for Class K fires and should always be close at hand in a commercial kitchen. These extinguishers use extinguishing agents that separate the fuel from the oxygen and help to absorb the heat elements of the fire triangle (fuel, heat, oxygen + chemical reaction).