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[Madmak]

Originally Posted by Aquattro

I use a float valve hooked through a solenoid that opens for 15 min 4 times a day. Pressure shutoff on RO unit. It's been working great for a couple years now and honestly the best thing I ever did for my tank.

That's essentially what I do, very low risk, easy to use, and not many parts.

To cause a flood the solenoid would need to fail on AND the float valve would need to fail at the same time. That would still only cause a 15 minute fail, the timer would need to fail as well to lengthen that.

Cycling my RO system just means a few extra automatic membrane rises per day.