American Tank Company LLC Davidson Tank Easy-Kleen Pressure Systems Ltd. Elmira Machine Industries / Wallenstein Vacuum Engine & Accessory, Inc. FlowMark Vacuum Trucks GapVax, Inc. Handle-Tech HotJet USA House of Imports Imperial Industries, Inc. ITI Trailers & Truck Bodies, Inc. Lincoln Center Manufacturing, LLC/Marengo Fabricated Steel Marsh Industrial Milwaukee Rubber Products, Inc. Moro USA, Inc. National Truck Center National Vacuum Equipment, Inc. Pik Rite, Inc. Pressure Lift Corporation Presvac Systems R.A. Ross & Associates NE, Inc. Robinson Vacuum Tanks Inc. Satellite Industries Sonetics Tank World Corp TankTec Transport Truck Sales, Inc. Transway Systems Inc. TSI Tank Services, Inc. Vacutrux Limited Vacuum Sales, Inc. VARCo Westmoor Ltd.