Also, here is the info on the elbow I found. http://www.dwyer-inst.com/Products/P...eName=Ordering
It is the Series V12 Flotect Flow Switch, cost is $40.25. I went with the 2.5 GPM switch. The switch closes the circuit when the flow is present.
This will work with Bill'* wiring setup if you get the one that has the switch close when the circuit flow is present like I did.
My problem is I wired the LED'* to ACC instead of ignition. That got annoying quick while trying to watch a movie on the screen. Tore my dash off in the walmart parking lot ripped the led wires out of the relay, put the dash all back together, and still had plenty of time to spare before the person I was waiting for finally came back. I'll be fixing that here soon.