A common misconception is that there are only 3 main types of fire extinguishers. In fact, there are 5 main types. They are:

Water fire extinguishers,

Foam (AFF Foam) fire extinguishers,

Dry Powder fire extinguishers,

CO2 fire extinguishers,

Wet Chemical fire extinguishers.

Each type of fire extinguisher has its unique set of firefighting capabilities and an ideal environment it is designed to protect.