Originally Posted by Arch Hoagland
I had a reverse osmosis system in my house. For every gallon of drinking water it produced 10 gallons of waste water.
Things have improved since then. This iSpring RO system
has a 1:1 filtered-water-to-waste-water ratio.
Currently I have a 1:3 ratio RO system in my RV and it does not fill up the gray tank. In my previous RV I plumbed the RO system back to the fresh water
tank. Zero waste.
OP, an RO system produces cleaner water than any 2-cartridge setup, a Berkey, or even an Elijah Craig system.