Abstract: The invention provides a self contained firefighting apparatus that is mounted on the side of a storage tank. This firefighting device employs a cylinder of compressed gas used as the driver for the “Aqueous Film Forming Foams” (AFFF) that is released by a bladder or piston system once the heat sensor located at the end of the dispensing outlet pipe is activated. A predetermined amount of the AFFF agent5 is then distributed onto the inferno depriving the fire of the necessary oxygen needed to fuel the continued combustion, thereby extinguishing the fire within seconds. 5 The amount of AFFF agent needed is based upon the particular or specific circumference of the storage tank requiring the storage tank fire suppression system.