Pressure vessel

Pressure vessel () for storing a fluid in an interior (), having a vessel opening () for conducting the fluid out of the interior of the pressure vessel and a connecting member () for fixing the connecting member to the pressure vessel in a fluid-tight manner, the connecting member comprising: a connecting element () having an opening () for conducting the fluid through the vessel opening in the pressure vessel and through the opening in the connecting element; a mechanism () for form-fittingly and detachably fixing the connecting element to the pressure vessel such that the connecting element rests on the pressure vessel with a compressive force, wherein the mechanism comprises a first tensioning lever () and a second tensioning lever (), which are connected pivotably relative to one another to a connecting joint such that, when the first tensioning lever and second tensioning lever are in a fixing position relative to one another, a compressive force is applied with the mechanism to the connecting element, and the connecting element bears against the pressure vessel with the compressive force.