• Amthor International
• Century Tank & Trailer, LLC
• Crown Tank
• Custom Boom Elbows Holdings Inc.
• Dragon Products
• Gardner Denver
• Gulf Systems, Inc.
• Hunter Truck Sales & Service, Inc.
• Imperial Industries, Inc.
• Jack Doheny Supplies
• KeeVac Industries, Inc.
• Lely Manufacturing, Inc.
• Nuera Transport
• PCI Manufacturing, LLC
• Pik Rite, Inc.
• Progress Vactruck
• Stuart Tank Sales Corp
• Tremcar Inc.
• Vacuum Sales, Inc.
• Watson Diesel
• Western International, Inc.