Auto Top Up Failed Again :(

[04V10]

In my old setup I had a double setup. Basically, the first sensor is for control to start and stop the auto top off. That one is fed through another auto top off which is just a secondary shut off. Both systems have to be satisfied to feed water. If the first one fails, the backup will de-energize the auto topoff pump.

I did this after flooding my tank and the salinity dropped to 1.010!

[mihaivapler]

What I use is a solenoid after my ro/di storage tank on a timer,every 2 hours on for 1 minute and as a back-up I use a big float valve in my sump, if the water rise to much it will stop from overflowing. Having it for 2 years and never had a problem..100% safe. Cost me 50$ all together