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Westlake Pipe & Fittings.
A Better Foundation.

With all the talk about infrastructure and water conservation, it’s time for a better solution. An updated system—rethought using environmentally sustainable materials that are engineered to last. Reinvented using the latest technology.

A system strong enough to deliver the water we need in cities, farms and everywhere in between. But most importantly, we need it to be strong enough to last generations.

Westlake Pipe & Fittings is bringing to light the pipe and fittings that make up A Better Foundation—the foundation that connects us all.


Our focus.

System solutions



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Why PVC?

PVC pipe is among the world’s most sustainable products, ideal for long-term use in underground infrastructure. It requires less energy and fewer resources to manufacture than old-technology materials, and its production creates virtually no waste.

It’s efficient, lightweight, non-toxic, corrosion-resistant and can last for 100 years or more. Additionally, PVC derivatives like PVC-O require up to 40% less material to produce than traditional PVC, issuing a new wave of innovation across market segments.


Energy to produce

PVC Iron Concrete

Average break rate per 100 miles

PVC 1.17 Iron 15.87

Average repair cost per 100 miles

PVC $11,700 Iron $158,700

Source: Uni-bell PVC Pipe Association

The Westlake
Pipe & Fittings difference.

We are dedicated to helping contractors maximize efficiency and helping engineers design systems that entire communities can rely on.

With manufacturing and distribution centers across North America, as well as dedicated sales, technical services, specification engineering and customer support teams—our unparalleled service allows you to design, specify or install complete projects with confidence.

We are constantly striving to introduce innovative products like Certa-Lok® CLIC™, NAPSYS™ HR/LR, Foamcore and PVCO to the market to ensure that our customers can maximize value and efficiency in their projects.

Houston Job Site

Our history.

  1. 1972

    North American Specialty Products (now Westlake Pipe & Fittings, formerly CertainTeed Pipe) begins manufacturing PVC Pipe

  2. 1979

    Certa-Lok® Restrained Joint PVC Pipe is introduced

  3. 1980

    Certa-Lok® expands into water well casing PVC pipe products

  4. 1985

    Certa-Lok® expands into municipal water and sewer market

  5. 1990

    Certa-Lok® product line continues to expand

  6. 1992

    North American Pipe forms as subsidiary of Westlake Chemical Corporation

  7. 1993

    North American Pipe acquires Texas PVC pipe plant

  8. 1994

    North American Pipe acquires three additional plants and begins producing vinyl fence

  9. 2004

    North American Pipe acquires three plants from Bristol Pipe

  10. 2008

    North American Pipe expands with construction of two plants

  11. 2009

    North American Pipe adds Janesville, WI plant through Freedom Plastics Acquisition

  12. 2013

    North American Pipe acquires CertainTeed Pipe and Foundations Division

  13. 2016

    North American Pipe acquires Royal Building Product's Pipe and Fittings division, part of Westlake Chemical's acquisition of Axiall Corporation

  14. 2019

    North American Pipe and Royal Pipe & Fittings become single brand - "NAPCO"

    Introduction of Certa-Lok® CLIC™ spline technology

    NAPCO opens dedicated Fittings distribution center in Woodbridge, ON

  15. 2020

    NAPCO opens dedicated Fittings distribution center in Newbern, TN

  16. 2021

    NAPCO announces the acquisition of LASCO Fittings, a leading designer, engineer and manufacturer of injected-molded PVC fittings

  17. 2022

    NAPCO announces brand change of North American business to Westlake Pipe & Fittings under Westlake Corporation's Housing and Infrastructure segment

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