How To Make An Automatic Switch For Your Shop Vac System Home Workshop ProjectsJuly 1, 2015 . The automatic switch How many places could you use it? Here is the website link the get the rest of the details http://www.ibuildit.ca/other%20projects/automatic-switch-1.html . Pages: 1 2 Sharing Twitter0 Facebook0 Google +0 Linkedinactive){li-icon[type=linkedin-bug][color=inverse] .background{fill Email this article Print this article Tags automatic switch, how to build an automatic switch