Originally Posted by hiitt2006
One more question,is it okay to run an RO unit only once a week.Right now I'm only going to need about 5 gallons of water a week,so it will not be producing water on a regular basis
Essentially, yes. The only condition may be that after a period of idleness, the manufacturer may recommend that an RO/DI unit may need to be flushed (letting all the water go to the waste outlet) for an hour or so. Some units also have a back-flushing setting that may also be a factor.
The length of the non-use period and re-starting proceedure may vary from manufactuer to manufacturer.