00239 Vacuum Pump Test – Here’s a test of a good working vacuum pump. This is a good benchmark test, showing that when a vacuum pump works well, it is capable of reaching down into a very deep vacuum. As shown in this video, this particular pump is capable of reaching 35 microns, which in the Philadelphia area, is about as low as you could possibly go. Thanks for watching, and if you have any questions or comments, please post them below, or visit our website at www.macsw.org. Enjoy!