GLOBAL STANDARDS. AFRICAN EXECUTION.
Slotted & Perforated Corrugated HDPE Drainage Pipes for Critical Infrastructure
GeoPipe™ HDPE Slotted Subsoil Drainage Pipes Engineered for Africa’s Harshest Conditions
GeoPipe™ is Africa’s reference solution for subsoil water drainage, engineered from high-strength HDPE slotted pipe technology to deliver reliable hydraulic performance in demanding ground conditions.
Designed for civil engineering, roadworks, mining, agriculture, and landscaping, GeoPipe™ achieves high infiltration rates with minimal clogging, even in fines-rich or unstable soils where inferior drainage pipes fail.
From South Africa’s expansive clay soils to West Africa’s laterites and East Africa’s rocky terrain, GeoPipe™ provides efficient subsurface drainage that protects infrastructure, improves ground stability, and extends service life.
What is GeoPipe™?
GeoPipe™ is a high-performance slotted HDPE subsoil drainage system, engineered for controlled water collection and long-term durability in civil, road, and infrastructure applications.
Key engineered features include:
Corrugated outer wall engineered for high ring stiffness and crush resistance under backfill and traffic loads
Smooth inner bore to maximise hydraulic efficiency and maintain consistent flow capacity
Precision-formed slots designed for optimal water entry while minimising soil ingress and clogging
GeoPipe™ is specified for subsoil drainage applications demanding long service life, consistent infiltration performance, and practical on-site handling in challenging ground conditions.
Applications
Subsoil drainage for roads, highways & pavements
(edge drains, formation drainage, pavement life extension)Retaining wall and MSE backdrain systems
(hydrostatic pressure relief behind reinforced soil structures)Landfill subgrade and liner drainage layers
(collection of infiltrating groundwater and leakage control beneath liner systems — not primary leachate headers)Landfill leachate drainage blankets (secondary drainage)
(used within drainage layers in combination with aggregates and geotextiles)Mining tailings storage facilities (TSFs) – foundation & underdrain systems
(pore pressure relief, seepage control, and foundation drainage where slotted pipes are specified)Mining platforms and industrial hardstands
(groundwater interception below working surfaces)Agricultural and farmland drainage systems
(field drainage and water table control)Golf courses, sports fields & landscaped areas
(rapid subsurface drainage and surface performance protection)Foundations, basements & substructure drainage
(perimeter drains and groundwater interception)
Technical note
Note: Our Slotted HDPE drainage pipes are typically used for subsoil, liner underdrain, and secondary drainage applications. Primary leachate collection headers are generally specified as solid-wall or fully perforated pipes, depending on hydraulic and regulatory requirements.
Available Sizes & Configurations
| Product Type | Available Diameters | Length Options |
|---|---|---|
| Rigid HDPE Slotted Pipe | DN75, DN110, DN160 | 6m straight lengths |
| Flexible HDPE Slotted Coils | DN75, DN110, DN160 | 25m coils, 50m coils |
✔ Manufactured to international standards
✔ Couplers and fittings available
✔ Compatible with Geotextile sock wraps (on request)
Why GeoPipe™ Is Specified for African Conditions
✅ Structural-Grade HDPE Construction
Engineered to resist crushing, deformation, and chemical attack under sustained burial loads and aggressive soils.✅ Engineered Slot Geometry
Precision-formed slotting delivers high infiltration rates while controlling soil ingress and reducing long-term clogging.✅ Smooth Hydraulic Flow Path
Low-friction inner bore maximises discharge capacity and maintains consistent flow over the pipe’s service life.✅ UV-Stabilised & Chemically Resistant
Suitable for exposed handling, harsh subsurface environments, and long-term underground installation without performance loss.✅ Rodent-Resistant, Weather-Tough Design
Withstands biological attack, temperature cycling, and site abuse where lightweight drainage pipes fail.✅ Supplied in Continuous Coils
Faster installation, fewer joints, reduced leakage risk, and lower installed cost on long drainage runs.
Optional Add-ons
Geotextile-Socked Versions – For silt-heavy environments
Joiners & Inspection Ports – For system integration
Gravel Filter Bedding Design Support – On request
Supplying Across Africa — Without Compromise
GeoPipe™ is supplied and supported across Africa through established logistics corridors and regional delivery capability:
Southern Africa — South Africa, Botswana, Namibia, Zimbabwe, Zambia
East Africa — Kenya, Tanzania, Rwanda, Uganda
West Africa — Ghana, Nigeria, Côte d’Ivoire
Central Africa — DRC, Angola, Congo-Brazzaville
We support projects with reliable lead times, region-specific logistics planning, and on-the-ground execution, ensuring GeoPipe™ systems are delivered where and when infrastructure demands them.
Engineer’s Specification Note
GeoPipe™ slotted HDPE corrugated drainage pipes are specified for subsoil and backdrain applications requiring long service life, structural reliability, and controlled infiltration in civil and infrastructure works.
Why GeoPipe™ Performs Where Others Fail
High ring stiffness resists collapse under load
Precision slotting reduces clogging in fines-rich soils
Smooth bore maintains hydraulic efficiency over time
Designed to avoid common drainage failures.
Engineered as a Complete Drainage System
GeoPipe™ integrates with geotextile filters, drainage aggregates, and liner systems to deliver reliable long-term subsurface drainage — not just water conveyance.
GeoPipe™ HDPE Corrugated Drainage Pipes — Key Specifications
| Property | DN110 | DN160 |
|---|---|---|
| Nominal Diameter | 110 mm | 160 mm |
| Inner Diameter | 92–95 mm | 138–140 mm |
| Outer Diameter | 110–111 mm | 160–161 mm |
| Construction | Double-wall corrugated | Double-wall corrugated |
| Material | HDPE | HDPE |
| Pipe Length | 6 m straight / 50 m coil | 6 m straight / 25 m coil |
| Minimum Bending Radius (coil) | 350 mm | 450 mm |
| Compression Resistance | ≥ 450 N (Normal Duty) | ≥ 450 N (Normal Duty) |
| Impact Resistance | Pass (SANS 61386-24) | Pass (SANS 61386-24) |
| Chemical Resistance | Pass (ISO/TR 10358) | Pass (ISO/TR 10358) |
| Typical Configuration | Slotted / Perforated / Unslotted | Slotted / Perforated / Unslotted |
| Standards Compliance | SANS 61386-24 | SANS 61386-24 |
Comprehensive HDPE Drainage Systems
**Engineered HDPE Drainage Specified for Projects That Cannot Fail**
GeoPipe™ HDPE drainage systems are engineered, specified, and supplied for civil, landfill, mining, and road infrastructure where long-term performance and execution certainty matter.
If drainage integrity is critical to the asset,
you’re in the right place.
Engineered Drainage Systems. Proven at Scale.
At Geosynthetics Africa, we supply engineered HDPE corrugated drainage pipe systems designed for landfills, leachate collection layers, roadworks, retaining walls, mining platforms, and civil infrastructure across Africa.
Our drainage solutions are specified for long service life, structural reliability, and consistent hydraulic performance, including slotted, perforated, and solid configurations, with specialist options available for UV exposure, chemical resistance, and demanding site conditions.
Every system is supported with technical guidance, correct application selection, and project-ready supply, ensuring compliance with local and international engineering standards — without compromise.