We're having a Kinetico water softener system installed today. They're planning on running the drain tube down the wash drain. We're a little concerned because they're not establishing an air gap but they're telling us the air gap is on the system and that this is how they do it nationwide. Anyone have any experience with these sytems? Is this true? If not, is there a way to fix this ourselves?
This may be a little late for you, given the question is some months old, however...
I have a Kinetico Premier Compact softener installed by the main water entry to the house.
It was installed about seven months ago by the local Kinetico distributor.
The drain tube does go to an air gap under the kitchen sink.
The installation manual states that this should be done, as shown here