What is the purpose of using swing joints on sprinkler heads?

Using swing joints on sprinkler heads serves the essential purpose of providing flexibility and reducing the risk of breakage. A swing joint is a type of connector that allows the sprinkler head to move or pivot, which is particularly beneficial in environments where the spray pattern might be affected by changes in the surrounding landscape, such as settling ground or shifting soil.

This flexibility helps to accommodate movement caused by physical disturbances or expansion and contraction due to temperature changes, ultimately protecting the sprinkler and its connecting components from stress and potential damage. Consequently, sprinkler systems become more durable and dependable, which is crucial for maintaining effective irrigation without interruptions due to equipment failure. The other options do not accurately encapsulate the primary function of swing joints in irrigation systems.