rodi automatic shut off

[pirate]

So I played around with it a buch and I found I had a couple of leaks at the unions, tried tightening it but they would no stop leaking. So i returned it and got a different one. Now I have a Kent marine one. Much easier to set up and does not leak but it still will not shut off the waste water.
So is there something funny about the buckeye rodi? I keep moving parts around all over bu nothing seems to stop it. So what have I done wrong?
I followed hillegom's link and I had mine set up the same way, as far as I could tell.
So now I am almost at the point of going out and buying a new rodi set up with the auto shut off already installed unless I figure this thing out.
Is there any other things I need to look at or buy to make this thing work?
Thanks