Testing or filling adapter equipped with a safety device

An adapter for testing or filling a container to be filled with fluid, particularly for an initial filling on an automobile production line, said adapter being composed of a body, an attachment module for attaching the adapter to the container to be filled, and a coupling system having a coupled position, in which a sealed connection is established between the body and the attachment module, and an uncoupled position, in which the attachment module can be separated from the body, with the body including a feed module comprising a plurality of conduits that include at least one fluid conduit, said fluid conduit being equipped with a safety valve that can be moved between an open configuration in which the safety valve permits the circulation of fluid in the fluid conduit and a closed configuration in which the safety valve prevents the circulation of fluid in the fluid conduit, with the safety valve being connected to a mirror element, said mirror element having a first configuration in which the safety valve is in the open configuration and a second configuration in which the safety valve is in the closed configuration,

• wherein the adapter comprises at least one safety device that cooperates with the coupling system, said safety device being movable between a locked position, in which the safety device locks the coupling system in the coupled position, and an unlocked position, in which the safety device allows the displacement of the coupling system to the uncoupled position, with the safety device also cooperating with the mirror element so as to enable the mirror element to be in its first configuration when the safety device is in the locked position, and forcing the mirror element to be in its second configuration when the safety device is moved from its locked position to its unlocked position.