Okay ... folks had me just about convinced to buy 4" pvc piping for the major portion of my DC waste runs and then I read a posting that said, in essence "Nope ... you NEED the turbulance in a corrugated pipe to keep the dust & chips in suspension."
So what's the real skinny on this? (I was at the orange box today pricing PVC stuff out ... even with pricier fittings, it is roughly comparable in cost to the Woodcraft / Rockler solutions. I especially liked the long curve Y pipes because of their very gradual entry to the straight pipe).
What I am presently envisioning is to use PVC up to the point where a piece of corrugated needs to be attached ... using corrugated only for the final few feet.
What say you? The layout of my shop will probably be pretty static (things will probably remain near their present location but move a little from time to time to accomodate larger stock / larger projects.) so the permanence of PVC is not a huge concern. I can locate all of my equipment around / near an outside wall so I don't plan on lofting the dust overhead until it actually hits the dust bag. The pipe can ride the floor and eventually be covered with shelving, cabinets and benches.
I am thinking that, with fairly short runs (max 30 ft), there probably isn't any effective difference. But that is a wild, wild guess.
Again ... what say you?
Bill