I need help with a return pump safety float switch

[Leaellynasaura]

I am looking at the ones here:

http://www.autotopoff.com/Single/index.html

I think these are designed to activate the relay when the tank water runs too low. Is there a way to run this backwards so that my return pump won't flood the room if my overflow box fails?

Thanks.

 

[Waterjockey]

I am looking at the ones here:

http://www.autotopoff.com/Single/index.html

I think these are designed to activate the relay when the tank water runs too low. Is there a way to run this backwards so that my return pump won't flood the room if my overflow box fails?

Thanks.

I'm not familiar with these, but wouldn't the skimmer one work the way you want? It appears to shut the skimmer off when the collection cup fills?

 

[mfinn]

Is there a way to run this backwards so that my return pump won't flood the room if my overflow box fails?

Thanks.

How do you think it might fail?
Is this a hang-on overflow box?

 

[Leaellynasaura]

Yes, I am concerned about the CPR overflow box failing even though I have an aqualifter. I read more on their site and it looks like I need to install the float switch upside down to make it work like I want.