hey blurry i can get a autotopoff.com dual float set up locally. It fills like you said from the bottom float to the top float(only 2 floats). It has the latching upgrade without the 3rd safety float. Would i be able to just wire in a 3rd BRS standard float as my safety. You know anything about them top off kits? I can get a good price new and local so i would like to grab that one if it will work for my application.
I've never played with the autotopoff.com stuff. looking on there page it looks like standard stuff with a simple controller. not saying anything bad about it, your apex can do all the same stuff.
the setup I was suggesting and personally use:
high level float switch -> to controller
top everything and send alarm if activated (has a second benefit that it will tell you if the return pump ever failed due to the increase in water level from the sump.
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add water float switch
when triggered add water for x seconds, then force off for y seconds. in a nutshell you are waiting for a low condition and toping off using time instead of an upper switch. more reliable than using an upper switch
double switch
same as single switch to activate topoff, except two switches in a row. take the lead from one switch and connect to the other switch. make sure that the supper switch is normally closed (contact closed) and the lower is open when up. the idea is that the upper switch is just a pass through, but if the lower ever got stuck closed, the upper will cut it off and start working as your only float switch. you will visually be able to tell (has happened to me more than once. when it does happen replace the lower float switch. using a multimeter makes this setup much easier. the digital aquatics float switch bracket can hold two switches, one up and one down.
sump low protect
my favorite float switch - if the sump runs low turn the return pump off for a 5 minutes and send an alarm
in summary using the apex is nice because you get alarms if you have the network hooked up
