Pneumatic technology uses pressured gas to drive some sort of mechanical motion. The most common gas used in pneumatic technology is dry air. The air must be dry as moisture has different compressive qualities. Pneumatic technology is very similar to hydraulic technology, however the fluid used to drive the motion here is always a liquid.Pneumatic systems are operated using a central pneumatic device (such as an air motor or compressor) and utilise manual or automatic solenoid valves to control the airflow around the system.Pneumatic systems contain many components, pneumatic multi-connector fittings being one example. Discover more in our complete guide to pneumatic fittings.What are pneumatic multi-connector fittings used for?Pneumatic multi-connector fittings enable many different tubes to be connected together which is useful in complex pneumatic systems. They are commonly found in positive pressure and vacuum systems and allow a large number of hoses to be connected when the space available is small.Types of pneumatic multi-connector fittingsPneumatic multi-connector fittings come in a variety of diameters, thread sizes, grades and materials. These adaptors allow the user to change the connections in a system so multiple hoses can be attached.