Disclosed is a filtration pump for a swimming pool, including a pump body suitable for resting on a horizontal support, the pump body has a suction port extended by a cylindrical suction structure with a horizontal axis, and a discharge port, extended by a cylindrical discharge structure with a vertical axis. The pump body allows adjustment: of the dimension corresponding to the height of the horizontal axis of the cylindrical suction structure, relative to the support, of the dimension corresponding to the height of the horizontal plane of the free end of the cylindrical discharge structure relative to the support, and of the dimension corresponding to the distance separating the vertical plane of the free end of the cylindrical suction structure and the vertical axis of the cylindrical discharge structure, and this continuously, each over a range of values and regardless of the others.