A 360-psi centralized system is a multiple cylinder system using welded cylinders from 67 lbs. to 590 lbs. pressurized with Nitrogen at 360 psi. For system using up to three cylinders, the first cylinder (master cylinder) is equipped with a manual level release and a solenoid electrical actuator and operates all the other (auxiliary) cylinders. All the cylinders must be filled with the same amount of agent. For centralized systems using cylinders of 190 lbs., 300 lbs., 430 lbs., and 590 lbs. the pressure in the master cylinder is directoed to the pneumatic head with rapture disc mounted on top of each auxiliary cylinder valve through a line of high-pressure hoses.