I have no idea how the thread went from PVC to EMT, but anyways, I have gotten used to just blowing a line through with compressed air, I have a portable 30 gallon tank compressor that will do about 150 psi, and I made a blow gun with 1/2" pipe a ball valve and a 12" long 1/2" soft copper tube out of the valve so I can bend it, when I stick it into the end of a larger pipe it creates a venturi effect, if the pipe has water in it I just wrap a rag around it to seal it and it will empty the pipe in no time, (good way to give a helper who don't like to take a bath a good spray) but anyway, just about any kind of thin plastic bag works, as long as you use a good bucket of jet line (a must to not slow down the payout of the line or you will run out of air before it gets through), communication with a helper will help keep you from running the whole bucket out through the pipe, because it will keep that line going (been there done that, the whole bucket
) but I have yet found a vac that works as good or as far (done a couple 300' runs with no problem) it also blows out any sand that might have got into the pipe which will put a damper on any pull, I keep a box of glad sandwich bags on the truck which work great for blowing line in.
But if you want to use a vac, make sure it has a 2" hose not the 1 1/4" smaller one, as you need the volume.