Industrial Vacuum Systems by Thorne Pneumatic
- A manufacturer of industrial vacuum systems, including portable vacuums, central vacuum cleaners, high capacity loading systems, filter separators, and pump packages.
- http://www.thorne-vacs.com/

Becker Pumps Corp. Central Vacuum Systems
- Manufacturer of industrial and medical central vacuum systems in two types: 100% oil-less, or oil flooded. Available in modular/expandable (to 6 pumps), or tank mounted designs.
- http://www.beckerpumps.com/