Water Extinguishers are most commonly used for class-A fires and are quite effective as one would imagine. Water has a great effect on cooling the fuel surfaces thereby reducing the paralysis rate of the fuel.

These are mainly water-based, with a foaming agent so that the foam can float on top of the burning liquid and break the interaction between the flames and the fuel surface.

BC powder is either sodium bicarbonate or potassium bicarbonate, finely powdered and propelled by carbon dioxide or nitrogen. Similarly to almost all extinguishing agents, the powders act as a thermal ballast making the flames too cool for the chemical reactions to continue. Gold in color, it has a liquid alkaline extinguishing agent and is specifically designed for use in kitchens on deep fryer fires involving fat and cooking oil. These extinguishers must never be used on fires involving live electrical equipment. CO2 (Carbon Dioxide) Fire Extinguishers are suitable for class B risks involving flammable liquids and for electrical hazards.