I'm with Tuga (and Jon). Having come back from a 2 month trip, and stopping a several locations overnight as well as campgrounds, I think it just makes sense to use the fresh water tank for its purpose...gimmee water NOW. Especially when pulling into locations just for night. Why bother. With my fresh water tank full I doubt that I am loosing very much performance. Also, being a lowly owner of an older coach, I have to manually hook up and unhook as well as hauling a heavy 50amp cord around, so, hook up for elec and not to worry (at least for a couple days). If laundry or dishes, are in line, yup, hook up and use direct feed .