18 inch x 20 Foot Corrugated N-12Slotted Perforated Pipe

ADS 18 inch x 20 Foot Corrugated N-12Slotted Perforated Pipe


SKU#:25201180 | MFG#:18810020IB

  • 18 inch diameter by 20 foot long reinforced polyethylene pipe
  • Perforated slotted construction for storm water applications
  • Dual wall corrugated pipe with smooth interior pipe
  • An excellent alternative to reinforced concrete and corrugated metal pipe
Ewing List Price (Per 100 ft) $4,419.35
Your Price (Per 100 ft) -
Minimum Order: 20 ft
Order in multiples of: 20 ft
Only available for pickup or local delivery. Local restrictions apply, contact local store.

N-12® pipe is the world standard for corrugated polyethylene drainage pipe. Introduced in 1987, N-12 dual wall pipe with its smooth interior wall and corrugated exterior wall, offers exceptional hydraulics and strength. Built using application specific high-density polyethylene, N-12 corrugated pipe also provides superior corrosion and abrasion resistance making it an excellent alternative to reinforced concrete and corrugated metal pipe. These properties have led to the increasing approval and acceptance of N-12 drainage pipe in storm water applications across the country.

Key Features and Benefits

  • With bell & spigot designs you simply lube and push together, field installation is a snap. Unlike pipes from other manufacturers, there are no additional gasket materials, grout or sealing bands to transport and apply.
  • In-line bell design means no need to dig bell holes - and no worries about improperly dug bell holes that can dip or sag, leading to bell shear.
  • Noticeably faster installation times
  • Lower labor costs


This specification describes 4- through 60-inch (100 to 1500 mm) ADS N-12 ST IB pipe (per ASTM F2648) for use in gravity-flow land drainage applications.

Pipe Requirements
ADS N-12 ST IB pipe (per ASTM F2648) shall have a smooth interior and annular exterior corrugations.

  • 4- through 60-inch (100 to 1500 mm) pipe shall meet ASTM F2648.
  • Manning’s “n” value for use in design shall be 0.012.

Joint Performance
Pipe shall be joined using a bell & spigot joint meeting ASTM F2648. The joint shall be soil-tight and gaskets, when applicable, shall meet the requirements of ASTM F477. Gaskets shall be installed by the pipe manufacturer and covered with a removable, protective wrap to ensure the gasket is free from debris. A joint lubricant available from the manufacturer shall be used on the gasket and bell during assembly.

Fittings shall conform to ASTM F2306. Bell and spigot connections shall utilize a spun-on or welded bell and valley or saddle gasket meeting the soil-tight joint performance requirements of ASTM F2306.

Material Properties
Material for pipe production shall be an engineered compound of virgin and recycled high density polyethylene conforming with the minimum requirements of cell classification 424420C (ESCR Test Condition B) for 4- through 10-inch (100 to 250 mm) diameters, and 435420C (ESCR Test Condition B) for 12- through 60-inch (300 to 1500 mm) diameters, as defined and described in the latest version of ASTM D3350, except that carbon black content should not exceed 4%. The design engineer shall verify compatibility with overall system including structural, hydraulic, material, and installation requirements for a given application.

Installation shall be in accordance with ASTM D2321 and ADS recommended installation guidelines, with the exception that minimum cover in trafficked areas for 4- through 48-inch (100 to 1200 mm) diameters shall be one foot. (0.3 m) and for 60-inch (1500 mm) diameter the minimum cover shall be 2 ft. (0.6 m) in single run applications. Backfill for minimum cover situations shall consist of Class 1 (compacted) or Class 2 (minimum 90% SPD) material. Maximum fill heights depend on embedment material and compaction level; please refer to Technical Note 2.02. Contact your local ADS representative or visit our website at www.ads-pipe.com for a copy of the latest installation guidelines.

Pipe Dimensions

Pipe I.D. in (mm) 4 (100) 6 (150) 8 (200) 10 (250) 12 (300) 15 (375) 18 (450) 24 (600) 30 (750) 36 (900) 42 (1050) 48 (1200) 60 (1500)
Pipe O.D.* in (mm) 4.8 (122) 6.9 (175) 9.1 (231) 11.4 (290) 14.5 (368) 18 (457) 22 (559) 28 (711) 36 (914) 42 (1067) 48 (1219) 54 (1372) 67 (1702)

*Pipe O.D. values are provided for reference purposes only, values stated for 12 through 60-inch are ±1 inch. Contact a sales representative for exact values

**All diameters available with or without perforations.

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