Deutto ATO Not Stopping

SenorCappuccino · Apr 24, 2020

Hey Everyone,

Recently upgraded to a Waterbox 40.2 Marine AIO. Decided to do it right and purchased equipment this time around.One of the things i bought was a Duetto ATO. I hooked it up and put it in my return chamber. It doesn't typically stop where I need it to. It'll go above the top V sensor. I've read its due to build up but it did this right out of the box. Am I doing something wrong?

Straasha · Apr 25, 2020

Mine will stop at the point in between the two sensors.

Copingwithpods · Apr 25, 2020

How far above the sensor is it getting?

Saltyreef · Apr 25, 2020

Did you install the siphon break on the hose above the water line in your ato container?
Is the ato containers water level higher than the sump?
My duetto did it when the siphon break hole clogged with kalk crust. Took me a while before i figured out the issue since it only happened after i filled the ato containers level to higher than the sump level.

Works flawlessly now i stopped using kalk and has been working grear for over a year. No issues overfilling anymore.