What is the function of a tapered fitting in a piping system?

A tapered fitting is designed specifically to connect pipes of differing diameters, facilitating smooth transitions between different pipe sizes. The taper allows for a more secure and effective connection, ensuring that the flow of fluid is not obstructed or disrupted as it moves from one diameter to another. The design also helps to minimize turbulence, which can be beneficial in maintaining the efficiency of the system.

While connecting pipes of equal diameters may be achieved with straight or coupling fittings, that is not the primary purpose of a tapered fitting. Similarly, while tapered fittings can indeed help create a seal, particularly when threaded, this is not their defining feature; rather, the primary focus is on the transition between sizes. Supporting vertical piping pertains more to braces or supports and is not within the function of a tapered fitting. Thus, the option highlighting the connection of pipes with differing diameters accurately captures the specific role of tapered fittings in a piping system.