These offer local gas isolation facilities that can be utilised during routine maintenance and installation procedures as well as during an emergency. They can be used for Oxygen, Nitrous Oxide, Oxy-Nitrous Oxide, Medical Air 4, Medical Air 7 and Vacuum. They come housed in a steel box with the front of the box is having a glass panel so clients can see at a glance the relevant gas type, valve position and gas flow. The valve can be accessed in an emergency by breaking the glass. There are NIST connectors both upstream and downstream of the valve to make it easy to test the pipeline pressure and also take gas samples for tests.