Automatic Water changes. It doesnt get any better then this.

Chris- Run wires for a breakout box along with water tubing. Set a float switch slightly above your water line from fresh SW bin. Hook up those wires to Apex. What this will do is shut off pump before you go dry.

Yup that's what I thought (I was following you posts ) but I'm so sure how long the breakout cables can be because I think they are low voltage and can't go very far. Also since it is a mixing station with the return pump and a wp 40 for mixing is there any chance that the flow can affect/trip the float switch? Thanks
 
Sorry Chris- Cant help you there. youde have to ask Neptune about that. Mine runs ~25 feet.
 
I think Dave has it running 60 feet. With low voltage you have to check the voltage drop across the ends of the wire. There wire charts to explain this better
 
I think Dave has it running 60 feet. With low voltage you have to check the voltage drop across the ends of the wire. There wire charts to explain this better

Let's see if I was paying attention in physics but if I remember correctly current is affected by resistance in the wire and the bigger the wire the less resistance and greater voltage V=IR some one check me. So if I use a smaller gauge wire shouldn't I be able to go farther???
 
It's all depends in current and voltage. I have a really good chart for this when I get home I will post it.
 
uploadfromtaptalk1391994589341.jpg
 
Lol spaghetti and veins.
Well here is a better explanation.
uploadfromtaptalk1392088142801.jpg

The current and voltage and be checked to get you a better idea. I think 20 will be large enough as I think their switch runs 12 volt. You need to double check. As you see the left chart you pick the length of the wire needed then come across the pick load then down to witch curve then down to see the wire size. I would not concern yourself with load curves. You can see better explanation with 10 amp load. You can run 8 ft with 18 ga wire or run 75 ft with 8 ga wire this chart helps a little for electrical wiring. There are others that might be easier to read or use but this gives you a good general idea. Like I said before I would use the wires for ac thermostat.
 
Here is using curve method
uploadfromtaptalk1392088944934.jpg

See you can use different wire size depending on load and way wire is installed
 
Yup that's what I thought (I was following you posts ) but I'm so sure how long the breakout cables can be because I think they are low voltage and can't go very far. Also since it is a mixing station with the return pump and a wp 40 for mixing is there any chance that the flow can affect/trip the float switch? Thanks

Use a cover like this on the float switch. It may also help if you make sure the water is moving from the top down rather than bottom up. http://autotopoff.com/products/SS1/

Cover looks to be some pipe with an endcap.
 
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