Description
Product Overview Dual Wall Drain Pipe 18 × 20
Key Products
18″ Dual Wall Drainage PIPE Heavyduty HDPE dual wall drainage pipe, high performance for storm and site drainage.
18″ x 20 Plastic Double Wall Culvert Pipe – N12 18 corrugated dual wall pipe suitable for drainage and culvert applications.
Nuflo 18 in. x 20 ft. Corrugated HDPE Drainage Pipe HDPE corrugated drainage pipe with bell and spigot.
Corrugated Pipe 18″ x 20 ft. Smooth Core Smooth interior core for efficient water flow.
Additional options include Double Wall Plastic Culverts 20′ – 18″ and Corrugated Dual Wall Culvert for alternative materials and price points.
General
The 18 × 20 dual wall drainage pipe is a highdensity polyethylene (HDPE) pipe engineered to convey stormwater and subsurface water efficiently and durably. ADS N12 series dual wall pipe has a smooth interior wall that lowers hydraulic resistance and improves flow, and a corrugated exterior wall that provides structural strength when buried underground. This combination of features makes it a top choice in residential, commercial, and infrastructure drainage systems where longterm performance is needed, while its lightweight design simplifies installation and reduces labor.
Key Features & Benefits
Nominal Diameter: 18 in
Length: 20 ft (reduces number of joints and speeds installation)
Material: HighDensity Polyethylene (HDPE) resists corrosion, chemical attack, and abrasion
Wall Construction: Dual wall smooth interior for efficient water flow (Mannings n 0.012) and corrugated exterior for strength
Joint Options:
Bell & spigot (soiltight or watertight) for secure, lowleak connections; many units include gaskets and factoryprepared bells
Plain end versions available for use with couplers or custom jointing
Hydraulic Efficiency: Smooth interior surface reduces clogging and improves flow capacity
Standards: Designed to meet AASHTO M294 and ASTM F2306/F2648 performance criteria for HDPE dual wall pipe
Lightweight: Easier to transport, handle, and install than concrete or metal alternatives
Applications: Subsurface drainage systems, French drains, stormwater conveyance, field and yard drainage, culverts, roadway edge drainage, and erosion control
Typical Specifications
| Attribute | Specification |
|---|---|
| Nominal Diameter | 18 in |
| Outer Diameter (approx.) | ~22 in (varies by model) |
| Unit Length | 20 ft |
| Material | HDPE (HighDensity Polyethylene) |
| Wall Type | Dual wall (smooth interior / corrugated exterior) |
| Standard Compliance | AASHTO M294, ASTM F2306/F2648 |
| Joint Type | Bell & spigot (soiltight/watertight) or plain end |
Common Use Cases
Stormwater drainage systems under lawns, driveways, and commercial sites.
French drain installations for yard and foundation water control.
Culverts and roadway drainage, handling high flow volumes efficiently.
Subsurface conveyance in agricultural or landscape projects.
Why Choose Dual Wall HDPE?
Efficient water movement: Smooth interior minimizes resistance and helps prevent clogging.
Longlasting materials: HDPE resists corrosion and environmental degradation.
Strong structural performance: Corrugated exterior helps support soil loads without heavy bedding.
Installation ease: Lighter weight and longer sticks make site handling much easier and faster.
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