I have three 6 gallon tanks, two under a seat and one under the motor at the transom. I want to be able to switch between these tanks without having raise the seat and swap the hose, or in case of the transom tank, swap it out with one of the empty tanks under the seat. I guess I need to have some kind of a manual fuel tank selector valve but have not had much success searching for one. Does anyone have any ideas or info on where to find a tank selector valve or how I can set up to swap these tanks as described above? Thanks!