When are return bends typically used in plumbing systems?

Return bends are utilized in plumbing systems to create a change in direction while allowing for efficient flow and minimizing pressure loss. They are particularly important in configurations where a line needs to navigate around obstacles or redirect fluid flow without creating excessive turbulence.

The correct scenario for the use of return bends is any situation where a reconfiguration of the piping is necessary, which is reflected in the option concerning their general purpose. This makes return bends a versatile component that can be implemented in both commercial and residential plumbing systems, as well as in applications involving different types of water supply.

Understanding the function of return bends highlights their importance beyond any specific installation type or water source. They can be found in a variety of applications, thus showing their broad utility in plumbing design.