Vacuum Truck
A vacuum truck mounts a sealed tank and a vacuum system on a truck chassis to pull liquids, sludge, and debris through a suction hose into the tank. Variants add high-pressure water systems for sewer jetting and hydro excavation.
How it works
A blower or vacuum pump evacuates air from the tank, and atmospheric pressure pushes material up the suction hose into it. A float or shutoff system stops flow before material reaches the vacuum machinery. Tanks discharge by gravity dump, pressure off-loading, or a full-opening rear door on debris bodies. Combination units add a water pump and hose reel: jetting nozzles flush sewer lines back toward the vacuum hose, and hydro excavation lances cut soil that the vacuum immediately removes, exposing buried utilities without mechanical digging.
Types & variants
- Liquid vacuum tankers
- Pump-based systems for septic, holding-tank, and liquid waste transfer.
- Combination sewer cleaners
- Vacuum plus high-pressure jetting for municipal catch basin and line maintenance.
- Hydro excavators
- Pressurized water cutting with vacuum recovery for utility daylighting.
- Industrial air movers
- High-CFM blowers move dry and abrasive material in plant environments.
Key specifications
| Specification | Typical range | What it means |
|---|---|---|
| Tank capacity (gal) | Industry models classified by gallon capacity; sizing determines application range. | Sets how much material is collected between off-loading trips. |
| Load capacity (kg) | 317-24,000 kg across cataloged models | Collected material weight the chassis can legally carry: water-weight loads hit limits before tank volume. |
| Engine power (hp) | 24.8-74.3 hp on cataloged auxiliary power units | Drives vacuum and water systems independently of the chassis engine. |
How the industry sizes it
Vacuum trucks are sized by tank volume in gallons. Units up to 2,500 gal serve sumps, catch basins, and small septic pump-outs. Models from 2,500 to 4,000 gal handle standard industrial vac work: tanks, pits, and concrete washout. Trucks above 4,000 gal support bulk liquid and slurry removal with long hauls between dump sites. Chassis GVWR is the real constraint: a 4,000 gal tank of water-weight material exceeds 33,000 lb before the truck itself.
Applications
- Catch basin, manhole, and sewer line cleaning
- Septic, grease trap, and holding-tank service
- Hydro excavation and utility daylighting
- Industrial spill response and tank cleanout
- Construction slurry and drilling-mud removal
Safety & operation
- Bond and ground the truck when handling flammable or combustible liquids.
- Treat tanks as permit-required confined spaces; never enter without a program in place.
- Relieve tank pressure or vacuum before opening doors and fittings.
- Stake out suction hoses under vacuum; a released hose whips with force.
Standards & certifications
- FMCSA · 49 CFR 383.93
- A tank (N) endorsement on the CDL is required for liquid tanks over threshold volumes on public roads.
- OSHA · 29 CFR 1910.146
- Vacuum tanks are permit-required confined spaces during internal cleaning and inspection.
- DOT/PHMSA · 49 CFR 173
- Hazardous material cargo rules apply when collected waste meets hazmat definitions.
Frequently asked
What is the difference between a vacuum truck and a combination unit?
Why does payload matter more than tank size?
What licensing do these trucks require?
Compare popular models
Find by spec →Normalised to the same units. A dash means the figure was not published.
| Model | Load capacity | Engine power |
|---|---|---|
| Ditch Witch HXT30 Truck Vacuum Excavator | 26,455 lb (12,000 kg) | 25 hp |
| Ditch Witch HXT50 Truck Vacuum Excavator | 52,911 lb (24,000 kg) | 49 hp |
| Ditch Witch HXT75 Truck Vacuum Excavator | 52,911 lb (24,000 kg) | 74 hp |
| Super Products Camel Max Series 900 Dump | 2,205 lb (1,000 kg) | - |
| Super Products Camel Max Series 1200 Dump | 3,307 lb (1,500 kg) | - |
| Super Products Camel Max Series 1200 Eject | 3,307 lb (1,500 kg) | - |
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Sources
Every specification is verified against the manufacturer's published data, with the source linked for reference.
All models
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