filters remove salt from the water. Desalination plants use RO
filters to make freshwater from seawater. He may have a couple filter canisters in his sump, but if it's an RO
unit, he's turning his saltwater into freshwater.
The Pros and Cons of Reverse Osmosis Desalination
technology is pretty easy to understand, with plant designs consisting of pipeline and filtration sections.
The pipeline draws saline water from a local into a filtration plant. The plant consists of a series of smaller pipes filled with RO
membranes. As the water moves through the RO
membranes, they catch salt and other organic and inorganic materials considered unhealthy in drinking water."