[Myka]

I think you misunderstood me, or I don't understand you (lol). I'm worried about the RO water siphoning into the sump through the ATO line.

Yeah, I hear you about full automation. I do like the idea of having things automated, but manually triggered. Such as, push button, salt is weighed and dumped in. There's a name for that isn't there? Same with the AWC, it would be nice to have the system do it itself, but I'd still like to be "monitoring" - can do testing while I'm waiting or something.