What is a swivel fitting used for?

A swivel fitting serves a critical function in fluid line systems by allowing for rotation between the connected lines without twisting them. This feature is particularly beneficial in applications where movement or vibration may occur, as it prevents kinking and potential damage to the lines. By permitting free rotation, swivel fittings enable better misalignment compensation and facilitate easier installation and maintenance.

For instance, in hydraulic applications where pipes may need to be repositioned, swivel fittings help ensure that the hoses can move without causing stress or damage to the connection.

The other options, such as increasing the diameter of a fluid line, reducing the overall weight of the system, or connecting two lines at a fixed angle, do not accurately describe the specific function of a swivel fitting. Instead, these applications pertain to different types of fittings or modifications used in fluid systems. Therefore, the distinct role of swivel fittings lies in their ability to allow for flexibility and movement while maintaining secure connections.