I am doing a bid for a small commercial site that uses a rain water catchment system. After figuring how all the heads and zones will layout i started figuring the cistern pump and how it would switch back and forth between city water and the cistern pump. after figuring on paper i thought it would be fun to build the control and since i didn't have much to do today that's what i did. It is in its rough form I plan to clean it up and add another relay so i can have isolation switches. But this is basically how it works, when the controller calls for water it send power to a float switch in the cistern (represented by the manual toggle), if there is water in the tank the float switch is closed and send power down the line to the PSR, also sends power to a NC relay that would then open and not allow the master valve on the city water to flow. so basically the float switch changes it back and forth between city and cistern. In the pics i used to RB valves to represent the PSR and MV. If you look i have indicator lights for what ever mode it is in that i will mount on the front panel along with the isolation switches. Does anyone recognize the cabinet?