Abstract: The device comprises a plurality of pipes (7a to 7h) which may contain liquid under pressure and whose ends are radially fixed in a circle in a plane, a coupling unit (17) having an end communicating with another pipe (40) and rotatively mounted in the plane within the circle, means (16) for driving the unit in rotation, and means (21) for bringing its end in succession in coincidence with the ends of the plurality of pipes. The coupling unit is telescopic, its axis of rotation (12) extends through a bowl (2) and its movable end (26) communicating with the other pipe (40) cooperates with the ends of the pipes (7a to 7h) which are closed by automatic valves.