Not only virtually all cruisers, but also major island countries and resorts all use R.O. equipment
on a mega scale. It is a proven and reliable source of potable water. I have had my Village Marine
Tech unit for a decade.
- - However, for the OP's questions - it is not cheap
. The purchase
of the brand name companies equipment costs from several thousands of dollars to $10K depending upon the amount of potable water it outputs and the array of automatic sensors and equipment on the units.
- - You can buy complete systems in one box/frame which is about the size of a large microwave oven
or you can buy the systems in separate components that you mount yourself in available corners and spaces in the boat.
- - They can run on 12VDC or AC. However, you must also use the machines at least every few days or follow various cleaning
procedures for longer periods of non-use.
- - On the other hand you can do the search and acquire the necessary components yourself and assemble your own machine for various sources. Also a good source of the R.O. machines are "used/surplus" boat parts
stores/warehouses where people bring their old, no longer needed units to sell. Also try eBay.
- - But do some serious research
first if you want to go the make-it-yourself route
or the buy a used/surplus unit. Otherwise, you can purchase
units already packaged and put together and all you need to do is bolt it into the boat and hook up the plumbing