SN8 corrugated PE coils for subsoil drainage (AS/NZS 2439.1).
Class 400 Agi Pipe is a corrugated polyethylene (PE) drainage coil with ring stiffness SN8 for reliable subsoil water collection and conveyance. Also called ag pipe, ag-line, slotted drain coil or subsoil drain, it is used in civil, landscaping and agricultural works to control groundwater around trenches, verges, structures and sports fields.
The slotted variants use a multi-slot pattern positioned in alternate corrugation valleys to balance intake and pipe strength. Choose slotted for infiltration, socked (slotted with a geotextile wrap) where filtration is specified or soils are fine/sandy, and unslotted for carrier/bypass sections. All formats are manufactured to AS/NZS 2439.1 for land drainage performance.
Format: Use slotted to collect groundwater in general soils. Select socked (slotted + geotextile wrap) where filtration is specified or soils are fine/sandy. Choose unslotted for carrier/bypass sections between collection points.
Diameter: 65mm for compact runs, 100mm as the all-round civil/landscape size, 160mm for higher flow capacity across longer runs or broader catchments.
Class: Class 400 (SN8) suits general subsoil drainage. For heavier loads, deeper cover or critical corridors, see Class 1000 (SN20).
| Standard | AS/NZS 2439.1 — Corrugated plastic pipes for land drainage. |
| Material | Corrugated polyethylene (PE). |
| Stiffness class | Class 400 — SN8. |
| Formats | Slotted; Socked (slotted + geotextile wrap); Unslotted. |
| Diameters | 65mm, 100mm, 160mm. |
| Coil lengths | 20m, 40m, 50m, 100m, 200m (size dependent). |
Dual-wall efficiency: Corrugated outer wall provides ring stiffness SN8 while the smooth bore supports efficient water conveyance.
Perforation pattern: Slotted variants use evenly distributed slots along the pipe length, positioned to balance intake with pipe strength and to minimise fines migration when used with specified filter media or a sock.
Material durability: Inert polyethylene (PE) resists corrosion and common soil chemicals and is UV-stabilised for typical site exposure prior to backfill.
Quality assurance: Supplied through ISO-aligned supply chains to meet AS/NZS 2439.1 for land drainage.
Download AS/NZS 2439.1 (PDF) | Request a quote
Related: Class 1000 Agi Pipe (SN20)
| Product Code | Product Description | Dimensions | Weight | Ref |
|---|---|---|---|---|
| AG400-65100 | 65mm x 100m Class 400 SN8 Slotted No Sock Agi Pipe Coil | 65mm x 100m | — | AS/NZS 2439.1 |
| AG400-65200 | 65mm x 200m Class 400 SN8 Slotted No Sock Agi Pipe Coil | 65mm x 200m | — | AS/NZS 2439.1 |
| AG400-10050 | 100mm x 50m Class 400 SN8 Slotted No Sock Agi Pipe Coil | 100mm x 50m | — | AS/NZS 2439.1 |
| AG400-100100 | 100mm x 100m Class 400 SN8 Slotted No Sock Agi Pipe Coil | 100mm x 100m | — | AS/NZS 2439.1 |
| AG400-16040 | 160mm x 40m Class 400 SN8 Slotted No Sock Agi Pipe Coil | 160mm x 40m | — | AS/NZS 2439.1 |
| Product Code | Product Description | Dimensions | Weight | Ref |
|---|---|---|---|---|
| AG400-65100S | 65mm x 100m Class 400 SN8 Slotted Socked Agi Pipe Coil | 65mm x 100m | — | AS/NZS 2439.1 |
| AG400-65200S | 65mm x 200m Class 400 SN8 Slotted Socked Agi Pipe Coil | 65mm x 200m | — | AS/NZS 2439.1 |
| AG400-100100S | 100mm x 100m Class 400 SN8 Slotted Socked Agi Pipe Coil | 100mm x 100m | — | AS/NZS 2439.1 |
| AG400-16040S | 160mm x 40m Class 400 SN8 Slotted Socked Agi Pipe Coil | 160mm x 40m | — | AS/NZS 2439.1 |
| Product Code | Product Description | Dimensions | Weight | Ref |
|---|---|---|---|---|
| AG400-100100U | 100mm x 100m Class 400 SN8 Unslotted No Sock Agi Pipe Coil | 100mm x 100m | — | AS/NZS 2439.1 |
| AG400-16040U | 160mm x 40m Class 400 SN8 Unslotted No Sock Agi Pipe Coil | 160mm x 40m | — | AS/NZS 2439.1 |
| Product Code | Product Description | Notes |
|---|---|---|
| AG400-65CAP | 65mm Class 400 End Cap Agi Pipe Fitting | Push-fit |
| AG400-65T | 65mm Class 400 Tee Agi Pipe Fitting | Push-fit |
| AG400-65Y | 65mm Class 400 Y Agi Pipe Fitting | Push-fit |
| AG400-100CAP | 100mm Class 400 End Cap Agi Pipe Fitting | Push-fit |
| AG400-100J | 100mm Class 400 Joiner Agi Pipe Fitting | Push-fit |
A corrugated polyethylene (PE) drainage coil to AS/NZS 2439.1 for land drainage with ring stiffness SN8. Used to collect and convey subsurface water in civil, landscaping and agricultural works.
SN is “stiffness number” (kN/m²). SN8 indicates the pipe resists a nominal ring load of 8 kN/m². It’s a measure of how well the pipe resists deformation under soil/traffic loads (higher SN = stiffer).
Slotted collects groundwater; socked is slotted with a geotextile wrap to help keep fines out; unslotted is a solid carrier/bypass section between collection points.
Common diameters: 65mm, 100mm, 160mm. Typical coils: 20–200m depending on size. See the Dimensions tab for Convic SKUs.
Yes — it’s widely referred to as agi pipe, ag pipe, ag-line, Draincoil (generic), slotted drain coil or subsoil drain.
Subsoil drainage in trenches/verges, behind retaining structures, landscapes/sports fields, and around building perimeters (to approved outlets).
Heavier duty corridors, deeper cover or higher load environments typically specify Class 1000 (SN20). See our Class 1000 Agi Pipe.
Keep subsoil systems separate from roofwater unless your engineer/council details otherwise. Agi drains generally discharge to an approved outlet or soakage system per the project design.
HDPE agi coils are typically UV-stabilised for normal site exposure prior to backfill. They are designed to be buried in service.
Joiners, end caps, tees and Y branches in matching diameters. See our Dimensions tab for common items.
Yes — certificates to AS/NZS 2439.1 are available on request with your order.
Delivery by truck to be forklift unloaded. Crane truck available on request.
