Regular Port Ball Valves are generally shorter end-to-end than full port valves. They are also made to be interchangeable with the same size gate valve. The weight difference between full port and regular port valves is substantial in large valves. The reduction in hole diameter of regular port ball is approximately 60% of the full port balls. The regular port is found on small, threaded end, end loaded valves in which the body construction requires a small ball diameter.