Pipes, Drainage & Ducting
Five integrated product families covering every subsurface drainage and cable management requirement across African civil, infrastructure, mining and building projects. GeoPipe™ slotted HDPE subsoil drainage pipes. GeoStruct™ high ring stiffness structured wall pipes. GeoDrain™ LD cuspated geocomposites and GSE® Hypernet geonets for leak detection and containment drainage. GeoDrain GR, CR and DS dimpled drainage boards for green roof, civil and protection applications. GeoDuct™ solid-wall HDPE cable and telecommunications ducting. Supplied across 30+ African countries.
| About Pipes, Drainage & Ducting
GeoPipe™ - Subsoil Drainage Pipes - Corrugated double-wall slotted HDPE drainage pipe for subsoil water collection and conveyance. Smooth inner bore for high flow velocity. Available DN50 to DN315 in 6m rigid lengths and coil formats with optional factory-fitted geotextile filter socks. The reference solution for French drains, road formation drainage, retaining wall back-drains, mining underdrain systems and agricultural drainage across Africa.
GeoStruct™ - Structured Wall Pipes - High ring stiffness structured wall HDPE pipe for deep burial, heavy traffic loading and demanding trench conditions where standard corrugated pipe is insufficient. Used for primary drainage collectors, stormwater conveyance and infrastructure drainage across African road, mining and municipal projects.
GeoDrain™ LD & GSE® Hypernet - Drainage Geonets & Geocomposites - GeoDrain™ LD cuspated HDPE drainage cores for leak detection, liner underdrain and containment drainage - the competitive alternative to Leak Drain from ABG Geosynthetics. GSE® Hypernet geonets - a Solmax registered product - for high-flow planar drainage in landfill, mining and containment liner systems.
GeoDrain GR, CR & DS - Dimpled Drainage Boards - GeoDrain GR - perforated HDPE green roof drainage sheet with 6.0 lt/m² water storage reservoirs, 20mm dimple, 200 kN/m². GeoDrain CR - civil drainage geocomposite (HDPE + bonded PP geotextile) for tunnels, basements, underground parking and retaining walls, five grades from 200 to 650 kN/m², 25 or 50-year durability per DIN EN 13252. GeoDrain DS - bare dimpled HDPE protection and ventilation sheet for moisture barriers and waterproofing protection, 200 kN/m², CE per DIN EN 13967.
GeoDuct™ - Cable Ducting Pipes - Solid-wall corrugated HDPE cable ducting for underground electrical, telecommunications and fibre-optic cable networks. Smooth internal bore for cable hauling and future network expansion without excavation. Available DN75 and DN110 in 6m rigid lengths and 50m coil formats.
| Common Applications and Engineering Use Cases
Subsoil Drainage & Filtration
Subsoil drainage, filtration and liner-system drainage. Select the exact product grade and installation detail through the approved project design.
Read MoreContainment Drainage
Containment for landfill cells, ash facilities and secondary-containment bunds. Select the exact product grade and installation detail through the approved project design.
Read MoreTSF Liner Drainage
Tailings basin containment, new cells, embankment interfaces and extensions. Select the exact product grade and installation detail through the approved project design.
Read MoreRoad & Rail Drainage
Geosynthetic systems for road foundations, rail formations and pavement rehabilitation. Select the exact product grade and installation detail through the approved project design.
Read More| Properties & Specifications
| Property | GeoPipe™ / GeoStruct™ | GeoDrain™ LD / GSE® Hypernet | GeoDrain GR / CR / DS |
|---|---|---|---|
| Material | HDPE | HDPE | HDPE |
| Primary function | Subsoil drainage · structured conveyance | Leak detection · liner underdrain · high-flow planar drainage | Green roof drainage · civil drainage · protection & ventilation |
| Grades / Sizes | DN50–DN315 GeoPipe™ · DN75–DN110 GeoDuct™ | LD 420 · LD 500 · GSE® Hypernet | GR 20/200 · CR 8/200–CR 10/650D · DS 8/500 |
| Compressive strength | Ring stiffness class per application | High compressive — contact Geosynthetics Africa | 200–650 kN/m² (CR) · 200 kN/m² (GR/DS) |
| Applications | French drains · roads · mining · telecom | Landfill · TSF · dam liner · containment | Green roofs · tunnels · basements · retaining walls |
| Certification | ISO 9001 · SANS standards | ISO 9001 · project-specific | CE DIN EN 13252 (GR/CR) · CE DIN EN 13967 (DS) |
| Types of Pipes, Drainage & Ducting
GeoDrain™ CR - Civil Dimpled Drainage Board
10 mm dimple height HDPE drainage board with heat-bonded PP geotextile filter layer. 200 kN/m² compressive strength. For basement wall drainage, retaining wall protection drain, podium deck drainage and general civil subsurface drainage. Roll dimensions 2.0 m × 20.0 m. CE certified to DIN EN 13252.
GeoDrain™ GR - Green Roof Drainage Board
20 mm perforated HDPE drainage board with water storage reservoirs holding 6.0 litres/m². Drains excess water through top perforations while retaining essential moisture for plant survival. 200 kN/m² compressive strength. For extensive and intensive green roof assemblies. Roll dimensions 2.4 m × 20.0 m.
GeoDrain™ LD - Liner Leakage Detection Geocomposite
High-strength cuspated HDPE drainage cores for leak detection and drainage between geomembrane liners in landfill cells, containment systems and heap leach facilities. LD 420 grade: 700 kN/m² compression resistance, 60 m roll length. LD 500 grade: 1 000 kN/m² compression resistance, 55 m roll length. LD 700 grade: 1 300 kN/m² compression resistance, 45 m roll length. All grades certified EN 13252 with CE mark. Retained thickness ≥87–93% at design load after 100-year design life.
GSE® Hypernet - Drainage Geonets
Biplanar and triplanar HDPE geonets for leachate collection layers, drainage blankets and liner system drainage composites in landfill, mining and containment applications. Supplied under full GSE® trademark and certification. Available laminated with geotextile as a geocomposite. Contact us for stocked grades and project pricing.
GeoPipe™ - Perforated HDPE Subsoil Drainage Pipe
Corrugated double-wall HDPE perforated drainage pipe for groundwater collection and conveyance. DN50 to DN315. Available in 6 m rigid lengths and flexible coil. Optional factory-fitted geotextile filter sock. For French drains, road subgrade drainage, retaining wall back-drains, agricultural drainage and foundation perimeter drains.
GeoStruct™ - Structured Wall HDPE Pipe
High ring stiffness structured wall HDPE pipe for deep burial, heavy traffic loading and demanding trench conditions. Available in full SN class range. Lightweight, corrosion-free alternative to concrete and vitrified clay pipes for gravity sewer, stormwater and industrial drainage systems.
GeoDuct™ - HDPE Cable Ducting
Solid-wall HDPE cable ducting with corrugated external wall and smooth internal bore for underground electrical, telecommunications and fibre-optic networks. DN50 to DN160. Mechanical protection with low-friction pull-through surface for efficient installation and future cable upgrades without excavation.
| Benefits of using Pipes, Drainage & Ducting
One supply source for five drainage families
GeoPipe™, GeoStruct™, GeoDuct™, GeoDrain™ and GSE® Hypernet supplied from a single account, single logistics chain and single technical support team. Simplifies procurement, reduces lead time risk and ensures product compatibility across complex drainage system specifications.
Engineered chemical and UV resistance
All HDPE and polyolefin products are manufactured from virgin polymer with 0.8–2.5% carbon black content for UV stabilisation. Resistant to acids, alkalis, oils and solvents across pH 4–9. Rated for buried service lives of 50–100 years depending on grade — documented in product data sheets and confirmed by independent testing.
Containment-grade drainage performance
GeoDrain™ LD drainage cores retain over 87% of their original thickness at 500 kPa after 100 years in service - independently tested to ASTM D7361. In-plane flow capacities of 0.54–2.10 l/(m·s) at relevant hydraulic gradients ensure leachate and drainage water is conveyed reliably under the most demanding liner system loads.
Pan-African availability and logistics
Standard drainage board, geocomposite and pipe lines are held ex-stock for rapid dispatch. Project quantities are sourced and consolidated through our regional logistics network. We supply and support projects across 30+ African countries - from South Africa and Mozambique to Kenya, Ghana and Nigeria.
| Frequently Asked Questions about Pipes, Drainage & Ducting
What is the difference between GeoDrain™ CR and GeoDrain™ GR?
What is GeoDrain™ LD and where is it used?
Do the GeoDrain™ geocomposites come with a geotextile filter layer?
GeoPipe™ be supplied without a filter sock?
What certifications do the GeoDrain™ products carry?
| Specifications for Installing Pipes, Drainage & Ducting
Drainage board orientation and overlap - GeoDrain™ CR and GR boards must be installed with the dimple cups facing the structure (drainage face toward the wall or substrate) and the geotextile facing the soil or growing medium. Rolls are lapped a minimum of 100 mm at all joints with geotextile-to-geotextile continuity maintained across overlaps. Boards should be covered within two weeks of installation to prevent UV degradation.
GeoDrain™ LD installation between liners - GeoDrain™ LD drainage cores are installed between primary and secondary geomembranes in the liner system configuration, with the cuspated face providing the drainage channel. The core provides a smooth contact interface against both adjacent geomembranes. Flow is directed toward collection sumps in the machine direction. GeoDrain products should be covered within 28 days of installation. Storage and handling guidelines available on request.
GeoPipe™ installation and bedding - GeoPipe™ must be bedded in clean, angular granular material (typically 13–20 mm crusher run or equivalent) with minimum 100 mm surround above, below and to each side of the pipe barrel. Backfill must be placed in compacted layers to prevent pipe deformation. Where geotextile filter socks are not factory-fitted, the pipe trench should be lined with an appropriate nonwoven geotextile before granular fill placement.
Storage and handling — all drainage products - All HDPE drainage rolls and pipe should be stored in a dry, cool location in original packaging, protected from direct UV exposure and direct heat sources. Rolls should be transported and stored vertically — never stacked horizontally on top of each other. Pallets should not be stacked. Drainage boards and geocomposites should be covered immediately after laying if they will not be backfilled within two weeks.
| Benefits of Choosing Our Products
- 5 Product Families · One Source - GeoPipe™ · GeoStruct™ · GeoDrain™ LD · GeoDrain GR/CR/DS · GeoDuct™ — subsoil drainage, structured wall pipe, leak detection geocomposites, dimpled boards and cable ducting across 30+ African countries
- GeoPipe™ - DN50 to DN315 - Africa's Reference Slotted HDPE Drainage Pipe – Corrugated double-wall, smooth bore, precision slots. 6m rigid and coil formats. Optional factory-fitted geotextile filter sock for fines-rich African soils
- GeoDrain™ LD – Cuspated Geocomposite – Competitive alternative to Leak Drain. LD 420 and LD 500 for leak detection, liner underdrain and containment drainage. GSE® Hypernet for high-flow planar geonet drainage
- GeoDrain CR – 200 to 650 kN/m² – Five Grades – Standard 25-year and enhanced D-suffix 50-year durability grades. Civil drainage geocomposite for tunnels, basements, underground parking and retaining walls. CE per DIN EN 13252
- GeoDuct™ – Solid Wall HDPE Cable Ducting – DN75 · DN110 · 6m rigid & 50m coil. Smooth bore for cable hauling and future expansion. Optional rodent-repellent. Fibre · telecoms · power · solar farm cable networks across Africa
- GeoStruct™ – High Ring Stiffness Structured Wall Pipe – Deep burial · heavy traffic · primary collectors. Where standard corrugated pipe is insufficient. Contact Geosynthetics Africa for SN class and diameter selection
| Projects with Pipes, Drainage & Ducting Across Africa
| Popular Pipes, Drainage & Ducting in our Catalogue
A curated selection of best-selling pipes, drainage & ducting. View full specs, request a quote, or add to your BOQ — without leaving this page.
GeoDrain LD 420 – 700 kN/m² Cuspated Leak Detection Core for Double Liner Systems
GeoDrain LD 420 is a single cuspated polyolefin core installed between primary and secondary geomembranes for leak detection and leachate transmission. Rated 700 kN/m² with 4.9mm thickness at 2 kPa and the highest in-plane flow in the range at working loads up to 200 kPa. CE certified to EN 13252 and supplied in 2.35–4.7m × 60m rolls.
GeoPipe HD™ - Heavy Duty Slotted HDPE Collector Drainage Pipe
Heavy duty double-wall corrugated HDPE drainage pipe in DN200, DN250 and DN315, supplied in 6 m rigid lengths. For collector and primary drainage lines under high cover and heavy loading - road and rail formation, mining underdrains, TSF toe drains and large agricultural schemes.
GeoDuct™ - HDPE Corrugated Double Wall Cable Ducting
HDPE cable duct in double-wall corrugated construction, DN50 to DN160. Corrugated outer wall for ring stiffness and crush resistance, smooth inner bore for low-friction cable pulling. Solid, unslotted. Supplied in 50 m and 25 m coils or 6 m rigid lengths with couplings, to SANS 61386-24.
GeoPipe™ - Slotted HDPE Subsoil Drainage Pipe
Double-wall corrugated HDPE subsoil drainage pipe with smooth inner bore and precision slots, DN110 and DN160. Supplied in coils or 6 m rigid lengths, with optional factory-fitted geotextile filter sock. For French drains, sports fields, back-drains and agricultural drainage.
| Industries that use Pipes, Drainage & Ducting
| Specsheets & Installation Guides
Download technical datasheets and step-by-step installation guides for Pipes, Drainage & Ducting.
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