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  1. #1
    Senior Member ak_sniper's Avatar
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    Auto Top-Off w/ 2 Float switches

    Im of building myself a 2 float switch auto top off for my setup, a lower switch that will activate when the water gets low enough and an upper switch which will turn off pump once its high enough.

    Here is a picture of the circuit I made, anyone can spot any problems in the design ? Tang_man ? :

    AK
    20G Reef Tank (Starting again...)

  2. #2
    Senior Member
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    it will work but the idea of useing your neutral wire as a cut off is not safe run both relays in series with your hot wire and your neutral directy to the pump

  3. #3
    Senior Member ak_sniper's Avatar
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    Alright I think I see what you mean...Ill see what I can about redoing the circuit to put my relay's in series...

    Ill post a pic of my circuit once I redo it...in the meantime, any other comments/suggestions is welcomed! :

    AK
    20G Reef Tank (Starting again...)

  4. #4
    Senior Member
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    this is what I would do my lower float is a n.o. contact the upper float is a n.c. contact(when full opens) these 2 float switches are in series with a relay (call it R1)a n.o.contact from R1 is in parallel with lower float ( this is a ladder diagram) then on the second line of the ladder diagram power 110 volts would run from a second R1 contact n.o. to the motor (I hope you understand) even my wife thinks this is screw up

  5. #5
    Senior Member ReefVan's Avatar
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    Try a pair of switches in series at the high level to avoid a failure.... in case one switch sticks....
    It's not junk, it's un-assembled DIY!

  6. #6
    Senior Member tang_man_montreal's Avatar
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    Sniper...

    Take a look at this schematic...

    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

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