The MACK System was designed as a portable air distribution box to meet the most demanding air handling needs of the Fire, Rescue, and Emergency Response industries. Each unit has been designed and tested by professional firefighters to meet NFPA requirements. All MACK Series units start with the MACK-1 basic functions. One or two SCBA cylinders provide air to the system. A CGA-347 high pressure inlet is also provided to allow continuous operation from truck mounted air cylinders. A low pressure regulator provides 0-125 psi air to a four outlet respirator manifold. A low pressure alarm whistle and a DC lamp to illuminate the case interior are provided standard.