The 1+ connector consists of just two parts, the connector body and the pressure screw. The clamping ring is incorporated into the pressure screw. The thread and connecting sleeve are integrated inside in the connector body. They cannot be damaged and are thus protected against external effects. Further advantages: The connector is completely leak-proof when it is "hand-tight" and no tools are required. This significantly reduces assembly times. The pressure screw can also be tightened with a fork wrench so there is no gap between the connection and the connector body.