JBJ Auto Top Off Float mod?

[JustinReef]

Does anyone know if there is a way to make the float valve from a JBJ auto top off either not drop as much or rise as much. Basically my sump evaporates a few gallons before the stupid thing tops off. In a smaller sump, the 1/2 that it allows for evaporation may be fine but in mine thats way too much. It turns on once a day basically and I want to make the distance the valve drops (or rises) less to have it come on more often.

Thanks!


After reading that back I hope that even makes sense!

[cujo6984]

you will need a smaller pump return area if you have the ato its a 1 gallon space it wont matter

[theatrus]

It makes sense, but I'm not sure of any particular mods. I've gone over float switches myself - too damn unreliable. My homebuilt system is entirely run by Honeywell optical sensors now.

[JustinReef]

<a href=showthread.php?s=&postid=13573570#post13573570 target=_blank>Originally posted</a> by cujo6984
you will need a smaller pump return area if you have the ato its a 1 gallon space it wont matter

Yes that is the obvious solution. I am looking for a way to not do that. Im not interested in draining my sump to create a small return section.

[JustinReef]

<a href=showthread.php?s=&postid=13573738#post13573738 target=_blank>Originally posted</a> by theatrus
It makes sense, but I'm not sure of any particular mods. I've gone over float switches myself - too damn unreliable. My homebuilt system is entirely run by Honeywell optical sensors now.

Used it on other tanks for years and never had a problem with them.

[das75]

<a href=showthread.php?s=&postid=13573738#post13573738 target=_blank>Originally posted</a> by theatrus
It makes sense, but I'm not sure of any particular mods. I've gone over float switches myself - too damn unreliable. My homebuilt system is entirely run by Honeywell optical sensors now.

My humidifier float valve is 100% trouble free but wondering on detais of your optical sensors and how are they hooked up (to a controller, DIY interface)?

[Salamander]

You can tweak the height of the two sensors to make it pretty sensitive. It takes nothing for mine to turn the pump on. Maybe 1-2 cups.

[Salamander]

But how do you have yours set up? Both floats in the tank or one in the tank and one in the reservoir? There are two modes the ATO will operate in. With both in the tank (not sure which mode it would be A or B) you can make it more sensitive.

[JustinReef]

<a href=showthread.php?s=&postid=13574676#post13574676 target=_blank>Originally posted</a> by Salamander
But how do you have yours set up? Both floats in the tank or one in the tank and one in the reservoir? There are two modes the ATO will operate in. With both in the tank (not sure which mode it would be A or B) you can make it more sensitive.

I have one in the tank and one in the reservoir. Thats mode A I think.

I don't know how to set up mode B.

[JustinReef]

<a href=showthread.php?s=&postid=13574666#post13574666 target=_blank>Originally posted</a> by Salamander
You can tweak the height of the two sensors to make it pretty sensitive. It takes nothing for mine to turn the pump on. Maybe 1-2 cups.

How do you do this?

Thanks!