Do you have a thread about your ATO? Is it siphon-based? Sounds interesting. I didn't know what options there were and ended up with an AquaHub DIY (sensors, relay, pump).
Well, yes and no. It's really gravity based.
When I think siphon, I think of something that that takes a fluid up and over something, and doesn't stop until the container is empty.
This is gravity based, utilizing 2 x heavy duty, fairly large float valves.
I know, I know- the haters will say, oh Float valves will stip, what if a snail.....
My RO/DI- the DI side goes to a plastic valve, then on to my resevoir- which is about 3 ft higher than my sump. The resevoir has a float valve to keep it at the level I want. (I also siphon a gallon out when I"m doing my dosing solutions) and then on to my sump- yep, another float valve.
For about 4 years- it has worked flawlessly. As soon as the sump level (my sump area alone is about 115g- in a 125g) drops at all from evaporation,
the DI water is trickled back in- it's on going thruout the day.
As I said, no pumps, no sensors, no electiricity, etc.
Engineers will tell you the more things you have in the system, the more they can go wrong.
** A heavy duty, plastic float valve can be found on Ebay for about 10-12$.
This system does not rely on the really cheapo floats that break when the water goes up too high, etc.
Some people can't simply use gravity.
I never have to 'fill' any containers or resevoits for my ATO- ever.
