Need to purigy water?
I''m not sure what size the membrane is in a water maker. To filter out virus'' you need to get down to 1/3 of a micron. Small bacteria is in the 3-8 micron size. When I used to design holding systems for aquatic animals used in research we would offer RO systems and they had no worry about bacteria and/or virus''. So I would assume an RO system gives you pretty pure water. All that passes the membrane is h2o molecules and some small ions.