Corrugated, smooth interior, high-density polyethylene (HDPE) pipe

Introduced in 1987, dual wall N-12 pipe, with its smooth interior wall and corrugated exterior, offers exceptional hydraulics and strength. Built using application-specific high-density polyethylene, dual wall N-12 corrugated pipe also provides superior corrosion and abrasion resistance. This makes it an excellent alternative to reinforced concrete (RCP) and corrugated metal pipe (CMP).

N-12 pipe is available in soil tight (ST), water tight (WT) and plain end, all of which offer joint options of bell and spigot design, gasket, bell wrap or pressure-rated 10.8 psi coupler.


  • Smooth interior with a Manning’s value of 0.012 resulting in increased flow capacity
  • Inert HDPE material is resistant to the effects of chemicals, abrasion, hot soils, and effluent
  • Lightweight product for best-installed cost and maximizing delivery and installation efficiencies
  • Structurally designed corrugated exterior to support typical construction and long term loading
  • Readily available in convenient locations to service local projects
  • Joint options to meet your application performance requirements, including up to water-tight joints meeting ASTM D3212
  • Available in ST, WT and Plain End
  • Joint options include bell and spigot design, gasket, bell wrap or pressure-rated 10.8 psi coupler


ADS’ 0201LU 2 lb. tub and 0801LU 8 lb. tub lubricant products for gasketed pipe joints:

  • Soft, paste like compound
  • High performance pipe joint lubricant
  • NSF certified for potable water pipelines
  • Contains no petroleum-Will not swell gaskets
  • Stable from -10 to 120°F
  • Non-toxic
  • No objectionable odor
  • Will not support bacteria
  • Effect on gaskets-less than 1% weight gain and less than 1 duro hardness loss
  • Effectively lubricates pipe and pipe gaskets for safe and efficient assembly Ask your sales representative for more information on these and other ADS products.

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