Pneumatic tubes, also known as capsule pipelines or pneumatic tube transport (PTT), are sophisticated systems designed to propel cylindrical containers through networks of tubes using compressed air or partial vacuum. Unlike conventional pipelines that transport fluids, pneumatic tubes are specifically utilized for transporting solid objects.

In conjunction with pneumatic tube systems, pneumatic fittings play a critical role. These fittings are components that connect pipe, tube, and hose sections within pneumatic systems—those involving pressurized gas. What sets pneumatic fittings apart from hydraulic fittings is their tighter seals and adherence to lower pressure standards. They are frequently employed in pneumatic logic control and instrumentation systems, where precision and reliability are paramount for efficient operation.