hook RO/DI to the sump

[mark]

Originally Posted by Captainhemo

You can also put a 2nd float above the 1st and have it as a backup/failsafe so should your 1st float stick or fails in some manner, your water will still shut down.

Would need something different than a humidifier float valve as no way to connect something to the output.

If wanted something with more redundancy, could easily wire, in series, a whole bunch of float switches tied to solenoid valve.