Abstract: A cleaning apparatus for automatic cleaning of a submerged surface includes a body defining an internal chamber having an inlet and a pair of outlets, with each outlet being connectable with a suction source. A liquid flow transferring element is located inside the chamber for alternately transferring flow of liquid to each of the pair of the outlets from the inlet. The apparatus further includes a cleaning foot which is associated with the body and communicating with the inlet, the cleaning foot having an outer surface adapted to be located adjacent to and to travel over the submerged surface. The body is pivotal relative to the foot about at least one axis that is substantially parallel to said outer surface, through an angle of at least 80.degree., between a first position which allows travel of the cleaning foot relative to the surface in a first direction, to a second position which allows travel of the cleaning foot relative to the surface in a second direction.