there usually used for source water. they are pretty expensive and will do a hundred or so gallons a day. they work in a 3:1 or worse ratio, with 3 gallons of waste water for every 1 gallon of good water. They need high pressure to fuction correctly, 70psi or so.Originally posted by silver_shark
How about a reverse osmosis setup?? I don't anything about these except that they are supposed to be the best way to keep the water clean.