A friend of mine recently purchased an Island Trader 46 and is planning on living aboard. He has a "Force 10" 6 gallon electric hot water heater and is looking to increase his hot water capacity. Is it possible to use a 30 gallon "superstore" to do so? Keeping the 6 gallon heater and piping the hot line directly into the superstore and the "out" of the superstore picking up the hot lines to the fixtures? Any suggestions?