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Projects

From a single house connection to treatment plants and pumping stations. An overview of our sites since the takeover in 2025.

139sites since 2025
43assignments for Aquafin
3regions: Flanders, Wallonia and the Netherlands
Map of Belgium and the southern Netherlands showing the municipalities where C4Sewer has worked Antwerp Ghent Brussels Leuven Hasselt Bruges Liège Namur Rotterdam Eindhoven Maastricht Kortrijk
Reference list

What we have done since 2025

By type of work, with the type of client and region. A full reference list with contact persons is available on request.

Manhole renovation and coating16 sites
WorkClientRegionYear
Manhole renovation – manholeAquafinAntwerp2025
Lining – DN2000 pipeContractorLimburg2025
Concrete repair – secondary clarifier wallAquafinLimburg2025
Injection, stabilisation and base renovation – manholesContractorLimburg2025
Renovation – 2 manholesContractorNetherlands2025
GRP lining – pumping stationAquafinEast Flanders2025
Repair – blind manhole DN1200ContractorEast Flanders2025
Epoxy coating (BENOR)ContractorFlanders2025
Masonry repair – manholeAquafinFlanders2025
Stabilisation, repair and GRP renovation – manholesIndustryLimburg2026
Lining – manholesContractorNetherlands2026
Lining – sewage pumping stationContractorNetherlands2026
GRP renovation, injection and stabilisation – manholesMunicipalityNetherlands2026
Epoxy coating (BENOR)ContractorEast Flanders2026
Epoxy coating (BENOR)ContractorFlanders2026
Epoxy coating (BENOR)ContractorFlanders2026
Injection and leak sealing91 sites
WorkClientRegionYear
Sealing the overflow and installing a non-return valve – pumping stationAquafinAntwerp2025
Injection and leak sealing – pump installationContractorAntwerp2025
Injection and leak sealing – sewer networkSewer operatorAntwerp2025
Injection and leak sealing – sewer networkAquafinAntwerp2025
Injection and leak sealing – sewer diversion on industrial siteContractorAntwerp2025
Joint injection at pipe end – sewerAquafinAntwerp2025
Injection of joints and cracks – sewerSewer operatorAntwerp2025
Joint injection – sewerContractorAntwerp2025
Joint injection – DN1000 sewerContractorAntwerp2025
Joint injection – DN800 sewerContractorAntwerp2025
Injection – manholeSewer operatorAntwerp2025
Walkway and expansion joint repair – treatment plant secondary clarifiersAquafinLimburg2025
Injection and leak sealing – treatment plantAquafinLimburg2025
Injection and leak sealing – treatment plantAquafinLimburg2025
Injection and leak sealing – treatment plantAquafinLimburg2025
Injection and leak sealing – sewer projectContractorLimburg2025
Injection and leak sealing – sewer projectContractorLimburg2025
Injection and leak sealing – sewer networkAquafinLimburg2025
Injection and leak sealing – sewer networkAquafinLimburg2025
Penetration injection – treatment plant secondary clarifierAquafinLimburg2025
Manhole ring injection – manholeAquafinLimburg2025
Expansion joint injection – concrete structureAquafinLimburg2025
Joint injection – sewerAquafinLimburg2025
Joint injection – DN1200 sewerContractorLimburg2025
Joint injection – sewer collectorContractorLimburg2025
Sealing a groundwater leak – pumping stationAquafinLimburg2025
Infiltration sealing – manholeAquafinLimburg2025
Leak sealing – treatment plantAquafinLimburg2025
Leak sealing – pumping stationAquafinLimburg2025
Leak sealing – pumping stationAquafinLimburg2025
Leak sealing – pumping stationAquafinLimburg2025
Waterproofing – treatment plant dry wellAquafinLimburg2025
Injection and leak sealing – sewer networkContractorEast Flanders2025
Injection and leak sealing – sports facilityContractorEast Flanders2025
Injection around the pipe – DN400 sewerContractorEast Flanders2025
Joint injection – sewer (several locations)ContractorEast Flanders2025
Joint injection – DN1200 sewerContractorEast Flanders2025
Sealing a spraying infiltration – DN1400 sewerContractorEast Flanders2025
Injection and leak sealing – treatment plantAquafinFlemish Brabant2025
Injection and leak sealing – treatment plantAquafinFlemish Brabant2025
Injection and leak sealing – sewer networkContractorFlemish Brabant2025
Injection and leak sealing – sewer networkAquafinFlemish Brabant2025
Injection and leak sealing – sewer networkAquafinFlemish Brabant2025
Joint injection at pipe ends – PE pipesContractorFlemish Brabant2025
Joint injection – sewerContractorFlemish Brabant2025
Injection – manholeContractorFlemish Brabant2025
Injection – basementContractorFlemish Brabant2025
Crack sealing – treatment plant selector tankAquafinFlemish Brabant2025
Sealing penetrations – buildingContractorFlanders2025
Waterproofing and maintenance – clubhouseAssociationFlanders2025
Construction joint injection – storage culvertContractorAntwerp2025–26
Joint injection – egg-shaped sewer 900/1800 mmSewer operatorAntwerp2025–26
Leak sealing – treatment plant selector tank and secondary clarifierAquafinLimburg2025–26
Injection – basementContractorFlemish Brabant2025–26
Sewer repair in several phases – sewerContractorFlemish Brabant2025–26
Injection and leak sealing – quay wallContractorAntwerp2026
Injection and leak sealing – sewer projectContractorAntwerp2026
Injection and leak sealing – sewer projectContractorAntwerp2026
Injection and leak sealing – sewer projectContractorAntwerp2026
Injection and leak sealing – sewer networkSewer operatorAntwerp2026
Joint injection at pipe ends and connection finishing – sewerSewer operatorAntwerp2026
Seam injection – pumping station crawl spaceAquafinAntwerp2026
Injection – basementContractorAntwerp2026
Injection – box culvert 1200 x 600 mmContractorAntwerp2026
Injection – DN1000 shaftContractorAntwerp2026
Sealing penetrations – houseHomeownerLimburg2026
Injection and leak sealing – construction projectContractorLimburg2026
Injection and leak sealing – DN600 sewerContractorLimburg2026
Kerb injection and concrete repair – concrete structureContractorLimburg2026
Injection of cast-in connection – DN700 sewerContractorLimburg2026
Joint injection – DN1200 sewerContractorLimburg2026
Injection – pump pitContractorLimburg2026
Injection work support – siteContractorLimburg2026
Various repairs – sewerContractorNetherlands2026
Injection – box culvertContractorNetherlands2026
Injection and leak sealing – sewer projectContractorEast Flanders2026
Leak sealing – pumping stationAquafinEast Flanders2026
Injection and leak sealing – sewer networkAquafinFlemish Brabant2026
Injection and leak sealing – sewer networkAquafinFlemish Brabant2026
Honeycomb injection – sewerContractorFlemish Brabant2026
Injection – treatment plant secondary clarifierAquafinFlemish Brabant2026
Leak sealing – pumping stationAquafinFlemish Brabant2026
Leak sealing – pumping stationAquafinFlemish Brabant2026
Leak sealing – pumping stationAquafinFlemish Brabant2026
Leak sealing – pumping stationAquafinFlemish Brabant2026
Leak sealing – pumping station (3 locations)AquafinFlemish Brabant2026
Sealing a penetration – buildingContractorFlanders2026
Joint injection – sewer (17 joints)ContractorWallonia2026
Injection and leak sealing – sewer networkContractorWest Flanders2026
Joint injection at pipe end – sewerContractorWest Flanders2026
Joint injection at pipe end – DN400 sewerContractorWest Flanders2026
Soil stabilisation and void filling10 sites
WorkClientRegionYear
Remediation and stabilisation – industrial siteContractorAntwerp2025
Injection and stabilisation – manholeContractorLimburg2025
Injection, stabilisation and installation of a GRP pipe – DN400 sewerContractorLimburg2025
Waterproofing and stabilisation – 2 manholesContractorLimburg2025
Void filling and stabilisation – subsoilContractorFlemish Brabant2025
Leak sealing and stabilisation – driveway and concrete slabContractorFlanders2025
Injection and stabilisation – ring roadAquafinAntwerp2026
Stabilisation – manholeSewer operatorAntwerp2026
Stabilisation – manholeSewer operatorAntwerp2026
Stabilisation – sewer networkAquafinFlemish Brabant2026
Local repairs and sleeves16 sites
WorkClientRegionYear
Installation of stainless steel sleeves (Link-Pipe) – DN400 sewerContractorAntwerp2025
Installation of stainless steel sleeves (Quick-Lock) – vitrified clay pipeContractorAntwerp2025
Local repair – DN400 sewerContractorLimburg2025
Installation of stainless steel sleeves (Link-Pipe) – DN500 collectorContractorLimburg2025
Local repairs – DN250 to DN600 sewerContractorFlemish Brabant2025
Radial crack repair – treatment plantContractorFlemish Brabant2025
Repair of honeycombing and concrete pipes – DN1200 sewerContractorWest Flanders2025
Installation of stainless steel sleeves (Big-Lock) – DN1600 sewerContractorAntwerp2026
Installation of stainless steel sleeves (Link-Pipe) – DN700 sewerContractorAntwerp2026
Installation of stainless steel sleeves (Quick-Lock) – sewerContractorAntwerp2026
Flow channel repair – manholeAquafinLimburg2026
Installation of stainless steel sleeves (Quick-Lock) – sewerContractorEast Flanders2026
Installation of stainless steel sleeves (End-Lock) – sewerContractorFlemish Brabant2026
Installation of stainless steel sleeves – sewerContractorFlemish Brabant2026
Connecting liners – sewerContractorWallonia2026
Joint repair – concrete box culvert 1200 x 800 mmContractorWest Flanders2026
Foam filling2 sites
WorkClientRegionYear
Foam filling – manholesContractorNetherlands2026
Foam filling – decommissioned pipeContractorFlemish Brabant2026
Foundation repair with micropiles4 sites
WorkClientRegionYear
Foundation repair with PU micropiles – business siteIndustryLimburg2025
Foundation repair with micropiles – houseHomeownerNetherlands2025
Foundation repair with micropiles – houseHomeownerFlanders2025
Foundation repair with micropilesContractorLimburg2026

Would you like references for a similar project? We are happy to provide them.

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