I supposedly live in a 'soft' water area and (even though the tds out of the tap is 120-150 ppm) I still operate using a 'Di only' van mounted system.
I don't want to have a RO unit, but I have considered storing rainwater as an alternative way of saving on resin.
Not having a Ro unit, I have never researched them 'fully'.
Just out of curiosity - If a person does live in a 'HARD' water area, have they GOT to have a RO unit.
What is a typical tds reading in a HARD water area?
Thanks
Mike