Within a fluid system, a ball valve serves as a form of quarter turn shut-off valve that may be used to manage the flow of liquids. With a rotary ball that has a straight bore cut through it, fluids can easily pass through the bore while it is positioned along the direction of flow. Once turned 90 degrees, the passage of fluid is removed, blocking liquids from continuing through the system. With this simple operation, ball valves serve as useful components for a great number of residential and commercial fluid applications.