Why not to use a low cost pump, like those used at car front-window cleaner ?
Will this "pump and tubing handle the temperature of 100C?" Normally the car window washer is made of plastic, and not designed for high temperatures. What is the volume? Will a hot plate in an electric aluminum coffer maker work? Of coures you need to control the volume of water flow, hitting the hot plate, and extract it from the bottom. Just a suggesstion?
Using electrodes, the water or (electrolite needs to be conductive) to produce current flow. Are there minerals in the water to make it conductive? Can you provide more details?