Wet chemical fire extinguishers

Wet chemical fire extinguishers employ a pressurised solution of alkali salts in water and are used for Class F cooking oil or fat fires (but not petroleum fires). Its principal application is in kitchens and food processing plants. In domestic kitchens a fire blanket is a reliable alternative when dealing with chip fat fires. They can also be used on Class A fires

How to use a wet chemical fire extinguishers:

1. Turn off the source of heat if safe to do so.
2. Hold the lance at arm's length, well above the fire with its nozzle at least 1 Metre away from the fire.
3. Holding the lance still, discharge so that the spraying wet chemical falls gently onto the surface of the fire.
4. Even if the fire appears to go out quickly, discharge the entire contents of the extinguisher.