As long as you're living on the coast. The saltwater piping (and especially pumps if needed) does not build or maintain itself, and this filter is unnecessary

As long as you're living on the coast. The saltwater piping (and especially pumps if needed) does not build or maintain itself, and this filter is unnecessary for river, well or rain water. It may be useful for salt lakes, but these are likely to go first. If you really need it for some reason, solar or other distillation is good enough on small scale.