Wiring a float and relay to protect your ATO pump and more

[Seth81]

Originally Posted by Alberta-newb

I was on EBay the other day and found the sensor from a Canadian seller for $5, it's one of these: http://www.sensortechnics.com/en/pro...-switches/olt/

The solenoid valve was another EBay purchase, I had to go with a "direct acting" valve as I'm using a gravity feed with virtually no pressure. If I was using a pump, the more common diaphragm type would work (requires about 3 psi typically)

I have to tell you that I have had some really bad luck with diaphragm valves. But if you are running RO/DI water through it you should have no problems. But I ran water to be disposed of, and I kept ketting crap growing in the valve and sticking it open!