the present invention is directed to an apparatus and method for controllably adjusting a fluid delivery device . the device includes an electrochemical pump capable of transporting a fluid . a displaceable member is positioned between a pump product chamber and a reservoir , wherein the pump product chamber is capable of retaining water generated from the pump . the displaceable member is controllably displaced upon generation of water from the electrochemical pump and the reservoir contains the fluid that is delivered upon displacement of the displaceable member .