A fuel coupling is a component used to create a secure and leak-proof connection between fuel hoses, pipes, or filters in a vehicle or machine. It ensures that fuel flows smoothly from the tank to the engine without leaks, which is essential for maintaining proper fuel delivery and preventing fuel spills or evaporation.

There are various types of fuel couplings, including quick-connect couplings, threaded couplings, and push-fit couplings. Quick-connect couplings are popular because they can be connected and disconnected without tools, making maintenance easier. Fuel couplings are made from materials such as stainless steel, brass, or plastic, depending on their application and resistance to fuel types like diesel or gasoline.

Signs that a fuel coupling may need replacement include a fuel odor, visible fuel leakage, cracks, or deformation on the coupling. If you notice fuel around the connections or if they appear loose, it may be time for an inspection and potential repair or replacement to ensure a secure connection and prevent fuel loss.