a fluid distribution system for an underwater pool cleaner comprises an inlet body having an inlet for receiving a supply of pressurized fluid , a valve assembly body in fluid communication with the inlet of the inlet body and including a plurality of fluid outlets , a first one of the outlets provides fluid for propelling the underwater pool cleaner in a forward direction and a second one of the outlets provides fluid for propelling the underwater pool cleaner in a reverse direction , and a valve subassembly fluidicly driven by the supply of pressurized fluid and periodically switching the supply of pressurized fluid from the first one of the outlets to the second one of the outlets to periodically change direction of propulsion of the underwater pool cleaner .