>I am pretty sure if you had to get your water from one of these devices you would not be using it to flush toilets or other non-essential use.
Are you suggesting that toilets, showers, washing machines use salt water?
Are you suggesting that toilets, showers, washing machines use salt water?
It would be an interesting experiment, since toilets use a great deal of water. Take a beach town, build a separate pressure water and sewer system, see if it's worth it. It's certainly more complicated than a sailboat's set up.