The automatic change over manifold is suitable for reduction and interception of the gas normally used in the laboratory. The device guarantees the real autonomy, totally independent from the human intervention. The central decompression unit ensures a stable flow able to satisfy most of the needs of the project, ensuring a flow not less than 20 Nm ³ / h @ 800 kPa. The quality of the components is guaranteed by careful controls in phase of acceptance and is guaranteed by compliance with company procedures reffered to the UNI EN ISO 9001: 2008.