If you got a room next to the tank for a reservoir, you could mount something as simple as a Brute garbage can on a platform, so it would be higher that the water level in your sump. Float valve and your friend gravity.
As for directly connecting 'a recipe for disaster', using a humidifier float valve, I keep going back to how many people have had their basement flooded from their furnace humidifier? I haven't nor know anyone to who it has.
Another negative I read is 'TDS creep' again I don't know. I've always seem to stay single digits and when I do get a rise, change filters and DI and the numbers drop down again. It that 'TDS creep' from being hooked directly up or dirty filters and exhausted resin?
Been two years trouble free configured like this, just hope I don't go home after work and find my basement flooded after typing this.
