I eventually want to use our wood stove to pre-heat water before it goes to the water heater. My FIL had a set-up where pipes ran from the tank, through or on top of the stove and then back to the tank. The water circulated itself through "convection" (is that the right term?). My wood stove has a heat shield on the back and it looks like it would be simple enough to run some copper tubing between it and the back of the stove. Would this have to be attached somehow or could it just "float" in this space between the back of the stove and the heatshield? My thought is to use a closet space behind the stove to house the tank. The water heater, which is in the basement, would then draw its water from the tank. I would also like to have some type of valve to send the water directly from the tank to our faucets, thus bypassing the water heater, in case we have a power outtage. We would then still have some hot water in the winter. Is this possible? Any thoughts or advice would be appreciated. A website with some type of plans would also be helpful. Thanks in advance.