Gully emptier

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  • Easy control
  • Multifunctional; vacuum, pressure, transport and cleaning
  • Maximum safety and minimum (traffic) nuisance

The KOKS gully emptier is suitable for emptying street gullies, sand catchers, sewage pumping stations and separators, and for flushing sewage wells, downpipes and sewers. In order to also be able to work over long distances, the truck is equipped with a hydraulically-extendable, 340˚ pivoting boom with a 1,400 mm extendable telescopic tube. The design includes a sludge tank, flushing/process water tank, a water ring vacuum pump and a high-pressure pump.


Do you have any questions about KOKS products or would you like to receive more information?
If so, please contact the KOKS sales team via telephone number +31 (0) 72 540 66 99 or via e-mail request@koks.com.


The KOKS gully emptier is the perfect vehicle for daily sewer cleaning work to ensure proper drainage of waste and rainwater and prevent clogging and flooding. In addition to emptying, unblocking and cleaning of gullies, sewers and pumping stations, the gully emptier can also be used as a suction truck for removing oil, petrol, grease, sludge, sand, clay, cement and other harmful substances from separators.


The KOKS gully emptier is constructed from high-quality materials and components. This guarantees a long service life and contributes to the wide range of applications for the truck and its ease of use. Operation of the gully emptier is not only easy, it is also extremely safe because all the controls are placed on one side of the vehicle (the starboard side). The operator can stand on the pavement for all control operations, which ensures maximum safety and minimal (traffic) nuisance.


The KOKS gully emptier comes with various option kits to match your needs, applications and/or activities.


  • Easy control.

  • Multifunctional; vacuum, pressure, transport and cleaning.

  • Ergonomic.

  • Powerful suction force.

  • Optimum balance between chassis with short wheelbase and maximum tank capacity.

  • Optimal weight distribution due to the central placement of the vacuum pump underneath the process water tank.

  • Maximum safety and minimum (traffic) nuisance due to all control operations being carried out from the pavement side of the truck.

  • Equipped with all the necessary safety features (traffic signs, flashing lights, etc.).

  • Access over long distances can be achieved thanks to the hydraulically-extendable holder with telescopic tube.

  • Solid construction and components for high power and maximum payload.

  • Built to the latest environmental and safety standards.

  • High quality, long service life and economical purchase price.

  • Ergonomic and chassis-independent construction thanks to the multifunctional sub-frame.

Suitable and constructed

full vacuum and overpressure of 0.5 bar.
vacuum pump placed centrally under the process water tank for optimal weight distribution.
construction on a 2-axle, min. 320 hp chassis.
transportation of sewer sludge.

Sludge tank

5,700 litres.
Corten-A steel, material number 1.8962.
Rear door
hydraulically opening and locking.
Level control
via gauge glass.
via tipping and pressure.
via suction.
4” suction/discharge connections with ball valve.

Service water tank

cooling the water ring vacuum pump.
approx. 850 litres.
same as the sludge tank.

Vacuum pump

water ring.
2,200 m3/hour.
Max. vacuum
cyclone pot with filter.
Four-way valve
for suction and pressure.
hydraulic from the engine/PTO distribution.

Outrigger arm

hydraulically-extendable to 1,400 mm and can pivot by approx. 340 ° by means of a heavy-duty slewing ring with worm drive.
on the well pipe.
spray pipe, fed by pump at 30 l/min and 25 bar.

Flushing water tank

high-pressure pump.
approx. 1,500 litres.
same as the sludge tank.
minimum level protection.

High-pressure pump

3-cylinder high-pressure plunger pump.
Working pressure
140 bars.
70 l/min.
Pressure control
via a manually-operated pressure control valve.
filter, fitted with shut-off valve.

High-pressure reel

manual operation.
50 m ½” high-pressure hose.

Standard safety features

safety valve, hose rupture protection for the rear door and tipping cylinder, rotating beacon, emergency stop, repair cross beam, crush protection and rear door safety lock.


work lamp, rear bumper, control box, hose container and tool box.
Noise level
in accordance with the applicable requirements, reduced by making use of a water ring pump and low operating speed.
Construction inspection
provided by KOKS Group.
Instruction books
consisting of manuals, drawings and diagrams.


approx 7,650 mm, depending on the chassis.
approx. 2,500 mm.
approx. 3,600 mm.
approx. 3,900 mm, depending on the chassis.


Empty weight
approx. 12.6 tonnes, depending on the chassis.
Max. authorised weight
19 tonnes, depending on the regulations in the country of destination and chosen chassis.

Need thorough advice?

We can imagine that you would like to know more about our products, the fields of application and our company.


Make an appointment without obligation to get to know us and our extensive range of industrial cleaning machines.


We will be more than willing to tell you why thousands of professionals worldwide trust KOKS Group and KOKS equipment.


You can contact us by calling +31 (0)72 540 66 99, by emailing info@koks.com or by filling in the contact form via the link below.


On working days we are available between 07.30 and 17.00 and we are happy to be of service.


As a producer and supplier of cleaning equipment, KOKS Group has gained a reputation as a reliable, innovative partner for the industrial sector.


KOKS is not only a strong player in the Netherlands and Europe, but our machines are finding their way around the world.


KOKS Group exists for 30 years and is a dynamic family business with seven specialized subsidiaries in the Netherlands, the Czech Republic, Saudi Arabia and the United States. The company also holds shares in rental organizations that operate in the Netherlands and the United Kingdom.