Westlake Pipe & Fittings, formerly NAPCO Pipe & Fittings, recently announced its new name to reflect the true value its customers receive from its extensive product portfolio backed by the brand equity of Westlake Corporation (NYSE: WLK), a Fortune 500 Company.

From our polyethylene that is used daily in food packaging like bread bags, cheese wrapping and milk cartons, to our PVC pipe which is used to deliver clean drinking water or to irrigate fields, our products make a difference in the world.

As the second largest PVC pipe manufacturer in North America, Westlake Pipe & Fittings offers an extensive range of PVC pipes & fittings from rubber gasketed to solvent weld to restrained joint — used in crucial applications, such as municipal water and sewer, residential plumbing, water wells, mining, and agricultural and turf irrigation.

manufacturer in North America, Westlake Pipe & Fittings offers an extensive range of PVC pipe & Fittings – from rubber gasketed to solvent weld to restrained joint – used in crucial applications, such as municipal water and sewer, residential plumbing, water wells, mining, and agricultural and turf irrigation. Westlake Dimex

Our commitment to quality products is so strong that it is symbolized through the two check marks that make up the "W" in our logo. We seek to maintain this commitment through an intensive practice of "never-ending process of improvement".

Westlake Housing & Infrastructure Products. Westlake businesses in the Housing & Infrastructure Products segment produce key finished goods for building products, pipe & fittings, and global compounds businesses.

About Westlake: Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, with operations in Asia, October 27 - 29, 2025

Westlake Corporation has approximately 16,000 employees and operates worldwide. Click here to view a listing of our locations.

PVC pipe products and PVC specialty pipe products. North American Pipe Corporation. United States of America. ... Westlake Corporation Headquarters. 2801 Post Oak Blvd., Suite 600 Houston, Texas 77056 USA. Receive Investor Relations Email Alerts. You may register to receive email alerts about new SEC filings, press releases or sign up for ...

Westlake Corporation has approximately 16,000 employees and operates worldwide. Click here to view a listing of our locations.