Hi Doug- tough one there, I'm in n.IL too and we've always had to use rmc for the riser- I was trying to find that in writing somewhere, but can't. So it was either Al or steel, but always threaded rigid, EMT isn't raintight vertically, and if you had to use a no-thread, it had to be on down side of coupling(threaded)- so you would thread into hub, and put weatherhead on the other cut end, or if higher than 10', then put the merchant coupling on the bottom of the top piece and the no-thread on the top of the bottom piece. And it is for sure about the continuous feeder through to the last socket. And to have to redo with all the rain!! Uff-da. good luck.
