This an aside to your question, there is a device called "I socket" that you plug a vac and router, miter saw, etc into. When the tool is turned on the vac comes on, when the tool is turned off the vac stays on for 7 sec to clear the line. They cost about $35. One downside is you are not supposed to run it for extended periods of time, the directions say 60 min.

Bill

Setting up a new shop. Deciding between a "shop vac" that is
: tool-activated to use for dust collection, vs. a "dust
: collector". Then again, I need to install a central vac for the
: house, and the central unit will be in the workshop area anyway, so the
: question is: Is there any reason NOT to use a household central vac unit
: as a workshop dust collector--i.e., with hose that connects directly to
: tools? Are there units that work particularly well for such dual purpose?

: Roger Turgeon
: Orr's Island, ME