Extinguisher Gun toy

The extinguisher gun operates using a pump. On the pumps downstroke, the valve to the tank is sealed. This forces the water in the upper chamber out of the nozzle, instead of back down the tank. On the pumps upstroke, the valve to the nozzle is sealed. This lowers the air pressure in the upper chamber and draws in water. Without the valve to the nozzle, the pump would simply draw in air from the outside. Both valves are called one-way valves because they let air or water pass through in only one direction. The extinguisher gun must be pumped several times before water will come out; this draws out the air initially trapped inside the tube of the tank.

An actual fire extinguisher can put out small fires. Different types of extinguishers use different firefighting agents, including water, foam, carbon dioxide, and dry and wet chemicals. The choice of an extinguisher depends on the type of fire, such as those from ordinary combustibles, flammable liquids and gases, and electrical equipment.