>  Anyone had good results (i.e. no leaks!) using EMT?
>

The PO of my van (or more likely, the jackass he had "fix" it)
installed a piece of EMT as a shunt in place of the leaking rear
heater. By the time it got to me, it was a corroded, oozing mess.
Trouble with EMT is that it's just galvanized mild steel (to keep it
bendable). It's perfectly good for keeping rain out of your house
wiring, but not quite so good as high pressure, high temperature
plumbing. EMT would probably work just fine for you application, but I
don't think I'd be able to sleep thinking about how much rust might be
forming...

--
John Bange
'90 Vanagon - "Geldsauger"