A breather hose flame trap is a component used in some automotive and industrial systems, particularly in engines and fuel systems. It serves to prevent the propagation of flames or the entry of sparks or flames into the breather system. This helps maintain safety by reducing the risk of potential fires or explosions in areas where flammable gases or vapors may be present, such as in the engine crankcase or fuel tanks. The flame trap typically consists of a mesh or filter that allows the passage of gases but blocks the transmission of flames and sparks. It is an essential safety feature in systems where flammable materials are present.