<html> <body> Terry - Just to follow up, because no one else did, here are just a couple of links to the debate about PVC tubing in dust systems.  You  probably already know this stuff, uh? <a href="http://www.woodweb.com/knowledge_base/PVC_piping.html" eudora="autourl"> http://www.woodweb.com/knowledge_base/PVC_piping.html</a> <a href="http://www.rockler.com/blog/index.cfm?commentID=44" eudora="autourl"> http://www.rockler.com/blog/index.cfm?commentID=44 </a>While there seem to be no reports of explosions resulting from static build up, all the literature emphasizes proper grounding when using PVC. At 10:41 AM 8/8/2006, Terry Farrell wrote: <blockquote type=cite class=cite cite="">And then there is the ducting thing. I haven't got that installed yet. I spent a lot of time trying to locate the recommended ASTM 2729 thin-wall six-inch PVC piping and failed. To the best of my knowledge it doesn't exist! I guess I'll have to settle for the next thicker stuff. And I haven't picked that up yet because I haven't installed a hitch on my car to pull a trailer for the pipe (although I did finally get a license plate for the trailer).   I</blockquote>Regards - David Skolnik </body> </html>