Abstract: An emergency air breathing system according to various aspects of the present technology is configured to utilize a standard operational firehose to refill an air tank carried by a firefighter or otherwise provide breathable air to the firefighter through their SCBA while fighting a fire. Various embodiments of the emergency air breathing system comprise a coupling device that can be selectively connected on a first end to a fire hose nozzle and a fire hose at a second end. A conduit section extends between the first and second ends and is configured to redirect a supply of breathable air out from a port in the conduit section and through a valve housing that can be selectively connected to the firefighter's air tank or a transfill hose of the SCBA.