Water Filter System (UPDATE)

The problem with an RO system in an RV is that the line pressures involved make it =extremely= inefficient. At home, provided we don't go < 60 psi, our system is about a 2:1 water-use ratio, meaning that it takes 2 gallons of waste water to make 1 gallon of RO water in the tank. With the low pressures in an RV, that will go to about 4:1 or even 5:1, meaning that it will take up to 5 gallons of fresh water to make 1 gallon of RO water. While nowhere being close to Muad'Dib, I simply won't waste that kind of water for an in-house RO in my RV; I'll schlep bottled water first.

Lyle