- Armal, Inc.
- Century Chemical Corp.
- Century Paper Products
- J&J Portable Sanitation Products
- Milwaukee Rubber Products, Inc.
- National Vacuum Equipment
- PolyJohn
- Portable Sanitation Association International
- Robinson Vacuum Tanks Inc.
- Satellite Industries
- Surco Portable Sanitation Products
- T.S.F. Company, Inc.
- VARCo
