A 20 m3 vacuum suction truck is usually considered when a normal collection truck starts making too many trips to the disposal point. It is tempting to look at the tank size first, but that is rarely the part that decides whether the truck will work well on site.
The more useful questions are straightforward: What is being collected? How far does the truck travel when loaded? Can the roads take a 6×4 vehicle? How will thick material leave the tank at the end of the shift? A good answer to those questions is worth more than simply asking for the largest available tank.
This guide uses one documented 20 m3 SHACMAN 6×4 reference configuration. It is a starting point for discussion, not a fixed offer. The final chassis, tank material, pump arrangement and safety equipment need to follow the actual material, route and destination-market requirements.
Where a 20 m3 vacuum truck makes sense
This size is normally for operators who are handling a serious daily volume of sewage, sludge, thick slurry or similar semi-liquid material. It can suit industrial sites, larger municipal routes and contractor fleets where the discharge point is not close to every collection location.
It is not automatically the right answer for every route. A large tank becomes heavy quickly, especially when the material is denser than water or contains solids. If the work is mainly in narrow streets, has limited turning space or requires frequent short moves, a smaller truck can be the more productive choice.
Before moving up to 20 m3, check the daily collection volume, road access, axle-load limits and the actual travel distance to the discharge point. Our vacuum truck tank capacity guide explains why capacity should follow the working cycle rather than a headline figure.
The documented 20 m3 reference configuration
| Item | Documented reference |
|---|---|
| Chassis | SHACMAN H3000 6×4, GCC-oriented reference chassis |
| Engine | WP12.400E50, 400 hp, Euro V reference |
| Wheelbase | 4,375 + 1,400 mm reference |
| Tank capacity | 20 m3 |
| Tank material | Q235 carbon steel |
| Tank wall and end-cap thickness | 8 mm reference |
| Vacuum pump | Jurop PN155 |
| Stated airflow | 910 m3/h |
| Stated vertical suction depth | Up to 9 m under suitable conditions |
| Suction arrangement | DN100 rear suction port with 10 m DN100 hose reference |
| Discharge arrangement | DN150 rear discharge ball valve |
| Tank discharge and access | Hydraulic tank lifting and hydraulically opened rear door |
The source proposal also includes a 400 L aluminium fuel tank, 315/80R22.5 tyres, Arabic and English/Arabic identification labels, and other GCC-project features. Those details show the direction of the original reference, but they are not a substitute for confirming the final destination country's registration, language and equipment requirements.
Why the chassis matters as much as the tank
A 20 m3 tank needs a chassis that is selected around the loaded working condition, not just the empty vehicle. The documented reference uses a 6×4 SHACMAN H3000 with a 400 hp engine and heavy-duty axle arrangement. That may suit a buyer who has enough road space, payload allowance and regular long-haul collection work.
For a different route, a different wheelbase, axle layout or chassis brand may be more practical. This is especially true where local parts support, drive side, emissions rules or road restrictions influence the purchase. The truck body, tank and chassis should be quoted as one package.
For heavier combined suction and sewer-cleaning work, compare the Heavy-Duty Vacuum & Jetting Truck. If the job also needs regular high-pressure pipe cleaning, see Combination Jetting and Vacuum Truck.
What the Jurop PN155 vacuum system tells you
In this reference configuration, the Jurop PN155 vacuum pump is listed with 910 m3/h airflow and a vertical suction depth of up to 9 m. The rear arrangement includes a DN100 suction port and a 10 m DN100 suction hose.
Those figures are useful, but they are not a promise that every job will reach the same result. Suction changes with the hose route, lift, material density, solids content, tank level, filter condition, altitude and maintenance. A hose pulling ordinary wastewater behaves differently from one recovering thick sludge or slurry.
The source configuration includes primary and secondary anti-overflow protection to help keep collected material out of the vacuum pump. This is the sort of detail that deserves attention in a quotation. A pump's stated airflow is only one part of a working suction system.
For a clearer view of pump selection, read How to Choose a Vacuum Pump for a Sewage Suction Truck.
Tank, rear door and discharge: the parts operators live with
The reference truck uses an 8 mm Q235 carbon-steel tank body and end caps, with internal stiffeners and external reinforcement hoops. It lists a sight window, pressure gauge and hand-washing station. The tank can be hydraulically lifted, and the rear door is hydraulically opened for discharge and cleaning access.
The proposal describes a pressurised discharge arrangement for sewage, sludge, thick slurry and semi-liquid material, together with positive- and negative-pressure relief devices. It also describes a rear-door safety interlock and mechanical support for maintenance under a raised tank. These features should be confirmed in the approved final drawings and operating instructions for the final tank design.
Carbon steel can be a practical choice for many normal sewage and sludge applications. It is not the automatic choice for corrosive, saline or chemically aggressive material. In those cases, the tank material, coating, valves, seals and pipework need a separate discussion. See Carbon Steel vs Stainless Steel Vacuum Tanks for the main selection points.
The questions that make a quotation more useful
When you ask for a 20 m3 vacuum suction truck, send more than a capacity request. These details help avoid an expensive mismatch later:
- The material to be recovered, including solids content, abrasiveness, temperature and corrosiveness
- The usual quantity per shift and distance to the disposal point
- The longest hose run and the expected vertical suction lift
- Whether the truck needs only vacuum recovery or also high-pressure cleaning
- Road width, turning limits, local axle-load limits and the preferred chassis brand
- Destination market, drive side, emissions requirement and available service support
- Preferred tank material, corrosion protection, hose type and discharge method
That is enough information to decide whether this 20 m3 6×4 direction is sensible, or whether another capacity, chassis or tank material would serve the operator better.
For tank bodies, pumps, hose systems and replacement equipment, see Vacuum Tanks, Pumps & Spare Parts.
Frequently Asked Questions
Is 20 m3 always better than a 10-12 m3 vacuum truck?
No. A 20 m3 truck can reduce disposal trips on suitable routes, but it needs enough road access, payload allowance and a working cycle that can use the capacity. A medium-size truck may be easier to operate on restricted routes.
Can this carbon-steel tank handle every type of industrial waste?
No. The documented reference uses Q235 carbon steel. Corrosive, saline, chemical or unusually abrasive material may require different tank materials, linings, valves and seals.
Can the stated 9 m suction depth be expected on every job?
No. It is a reference value from the supplied configuration under suitable working conditions. Actual results depend on the material, hose layout, lift, tank level and maintenance condition.
Can this truck also clean blocked sewer lines?
This reference is a vacuum suction truck. It can be developed into a combined solution where a high-pressure cleaning system is required, but the pump, hose reel and nozzle package should be selected around the pipe-cleaning job.
What should I send for a configuration recommendation?
Send the working material, required daily capacity, normal suction distance, road conditions, destination market and any preferred chassis direction to CLW Group.