I want to run 12v from battery forward to area in bow where previous owner put a 20g water tank. I want to put a demand pump up there to provide presurized water to the two sinks. What is the best route? I would, also, like to find a way to put one of those retractable showers in the cockpit. I'd use it for both a shower and a cockpit washdown. Any suggestions? I'm sure I could T into one of the sink supply lines. I'd guess that water sitting in the tank all week in the closed up boat would be pretty warm.