My DIY ATO system

Well here it go's Total price about $45.00 and had a great time making it. Here are the build pictures
Parts list
1 = Aqua lifter AW20 dosing pump 19.00
2 = Liquid water level sensor 9.00
 Heat shrink tubing, extra lamp cord, plexiglass pieces, liquid tape(water proofing) and some other things I am sure I forgot about. On with the pictures. Hope you enjoy
Just so everyone understands I check this electrically and its safe. I can explain if anyone wants to know, but I did the leg work prior to doing this DIY.
Aqua lifter pump

tubing

liquid tape

Liquid water level sensors

Used these to hold the tubing in the sump and the 5gal bucket.

OK before I did this project I invested some time in researching it. I wanted to make sure it was safe as I could make it.
First I took the pump and spliced into the wire going to the neutral side of the plug. Had to do this twice. Once for the sump sensor and once for 5gallon bucket sensor for the R/O. Both connections are done this way. At the splice and at sensor.

Next I added extensions with the lamp cord to give me a long length to go to float sensors. I soldered the two wires and then waterproofed them with liquid tape. I also put shrink tube around that and liquid tape on the shrink tube too.



next I made the sensor hangers and the water tube hangers. Picture tell it all I think


sensor hanger in bucket

sensor hanger in sump

Here it is completed

Inservice pictures

Sensor location in sump

Hope you learned something I did. Really like DIY's
Thanks
 
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Here is the switch I bought and it rated 220v AC max and 0.5A Max Model CS-CO057 and i think that is the difference. Aqua Lifter dosing Pump is rated 115v and 0.027A. This is the one I bought and price was raised, because I only paid 1.99 each plus shipping. http://www.ebay.com/itm/130504909109?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
All my connections are waterproof, but do not get closer then 12" from water and switches are waterproof. Not sure, but this one said AC so i used it as such and system is working great.
I talked with a few electricians at work and showed them the switch specs and pump and they seem to agree. Not sure if relay would benefit this system or not. If I missed something please let me know. Many sensors on ebay are AC/DC or just DC. I picked one that says AC. I did a search for the model number and it was AC as far as I could tell.

I bought everything on Ebay..

Thanks

 

Thanks,
Yes they are bulkhead type, but are harmonically sealed I think they call it and are Corrosive resistant and so forth so I think the insulation/potting material is much like a powerhead has in it. Remember we all use submersible devices in our tanks. I feel comfortable with the installation, but I will keep it in mind that when I am in the tank that I unplug the pump just in case. I have the tank on a GFCI  along with a grounding probe.
These switches are rated for AC power and as far as the potting I think I can salve that by mounting the switch in a pvc tube with a cap on bottom running wires up the tube and out with out being in water. I will have to cut and reconnect everything again, but its only time. For the time being I will keep it running and keep an eye on it.
Thanks everyone for the insight and I will keep you updated