I have a Kinetico Softener system that was installed into my house before I bought it . It is an older system. I am being asked by Kinetico to install a Reverse Osmosis system in addtion to my old softener. As I understand their K5 Reverse osmosis system uses fiters called a MAC filter that automatically quits working when it is metered at 500 gallons. I imagine this benefits Kinetico very well being the system completely shuts off when they reach 500 gallons & you must buy their expensive filters to get it working again. When they probably could keep working decently a few months more if needed. I was ready to buy this K5 until I read about these filters, now does anyone know if ALL reverse Osmosis systems have these kinds of filters?? if ALL Kinetico systems do only, or just this newer K5 system? The Rep is telling me the K2- system does not use the MAC filters that will shut down at 500 gallons, but when I look on their site, it seems to me this is the only kind of filter they sell, so I am confused and do not know what to believe. Also they claim thier Reverse Osmosis uses WAY less waste water than others, is this true or hype. And does all RO systems have to be drained out into your septic system? I felt this would be an added burden to the septic system. How important is RO systems anyway, if your softener is working correctly (mine has some issues that need fixed), I probably wouldn't need this at all ? Please reply if you have any advice or know the details about these systems. Thank you.