The Ring-O-Matic 850 Vacuum Excavator is a heavy-duty piece of industrial hydrovac equipment for sale at Joe Johnson Equipment. It is used in a wide variety of applications, including: pit cleaning, environmental cleanup, construction site cleanup, and many other uses. Ring-O- Matic manufactures Vacuum Excavation equipment trailer mounted; on a skid; or on a truck bed. This versatility ensures you will have the best configuration for your application. No matter what you require, a Vacuum Truck, a Vacuum Trailer, or a Skid Mount system, Ring-O- Matic does it all.