Abstract: Hand operated, functional pump systems to pump fresh water from a hose connection or permanent connection comprise novel flow control mechanisms wherein the principal embodiment utilizes a piston rod, piston head arrangement sliding within a cylindrical jacket to expose water intake ports to outlet manifold ports through the action of a pump handle thereby controlling the flow of water to an outlet spout. In another embodiment, tandem valves, in one model, are controlled by a novel linkage arrangement to open and close each valve in a predetermined manner to allow or stop the flow of water.