I was having the same problem, and after much searching in the logical plumbing / ducting areas, I found 25 foot hoses designed for septic system use for about $10. They were in the back of one of the Houston area BORGs next to the sump pumps (I think), though I don't remember which chain, or have the part number.
They come in a number of diameters, and are light weight spiral plastic that look like vacuum cleaner hoses. They do not have metal reinforcing. About every 6 feet, there's a 4" straight part with plastic reinforcing ribs to make cutting to desired length easy.
Hooked straight to a big shopvac and with the end stopped off, they shrink lengthwise down the accordian / spiral, but don't collapse.
I have them strung all over the shop to different tools via a 2x2x2 box that acts as a plenum, then to a trash can chip separator that goes to the vac. Poor man's sawdust collector. ;)
For your adapter, try a 35mm film can with the bottom cut off. I've made a bunch of adapters out of left over PVC parts from sink piping repair kits. All it usually takes is a little sanding or making some lenghthwise slits in the thin plastic.
Get creative!
trs80 wrote:
> I have an orbital sander with dust bag. The nipple fitting is 7/8 dia. Id
> like to hook that up to the shop vac as that fine dust is the worst of all.
> Where can one find or jury rig small hose and adapter for such a thing? The
> sander hose would have to have a long length of the small dia for ease of
> movement.
>
> any thoughts?
>