The 3 most commonly seen types of fire extinguishers are Water fire extinguishers, Foam fire extinguishers and Dry Powder fire extinguishers. However, there are 5 main types of fire extinguishers. On top of those 3 types, there are also CO2 fire extinguishers and 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.