Description
Product Overview 18 × 30 DualWall HDPE Drainage Pipe
Featured DualWall Pipe Option
18in x 30ft Plastic DualWall Culvert Pipe A heavyduty 18 diameter, 30foot HDPE dualwall pipe with corrugated exterior and smooth interior suitable for drainage and stormwater conveyance.
The 18 × 30 HDPE dualwall drainage pipe is designed for efficient stormwater and subsurface drainage. Its smooth interior wall helps maximize hydraulic flow performance and reduces clogging, while the corrugated exterior wall ensures structural strength under soil loads once buried. Made from highdensity polyethylene (HDPE), this pipe resists corrosion, abrasion, chemicals, and freeze/thaw cycles offering longterm performance with low maintenance. Dualwall drainage pipe is often used as a light to mediumduty alternative to concrete or metal pipe in storm sewer systems, French drains, culverts, agricultural fields, and landscape applications.
Key Features & Benefits
Nominal Diameter: 18 in (internal)
Length: 30 ft per stick longer sections reduce the number of joints and speed installation.
Material: HighDensity Polyethylene (HDPE) durable and corrosionresistant.
Wall Construction: Dual wall smooth interior for improved water flow; corrugated exterior for strength.
Hydraulics: Smooth interior yields a low Mannings n (~0.012) for efficient gravity drainage.
Joint Options: Often available with bell & spigot joint connections (soiltight or watertight) depending on the specific product helps create secure, lowleak installations.
Lightweight & Easy to Install: Easier to handle than concrete pipe and can be installed with typical trenching and bedding practices.
Typical Specifications
| Attribute | Specification |
|---|---|
| Nominal Diameter | 18 in |
| Approx. Outside Diameter | ~22 in (varies with series/design) |
| Length (per stick) | 30 ft (long lengths reduce joints) |
| Material | HDPE (HighDensity Polyethylene) |
| Wall Type | Dual wall smooth interior / corrugated exterior |
| Hydraulic Mannings n | ~0.012 (smooth interior improves flow) |
| Joint Options | Bell & Spigot (soiltight or watertight) |
| Typical Standards | AASHTO M294, ASTM F2306, ASTM F2648 (depending on model and joint type) |
Typical Benefits
Efficient storm drainage: Smooth interior allows quick movement of water through the system, reducing runoff issues.
Durability: HDPE resists corrosion, chemicals, and abrasion, extending service life.
Strength: Corrugated exterior provides structural support for buried applications.
Installation ease: Long pipe lengths and lightweight material reduce installation time and labor.
Common Uses
Stormwater management yard drains, roadside drainage, and storm sewer systems.
French drains and subsurface drainage to manage groundwater and prevent soil saturation.
Culverts and underdriveway drains where gravity conveyance is needed.
Landscape or agricultural drainage for improved soil moisture control.
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