Founded in 1966, Northwest Pipe Company manufactures engineered water pipeline and infrastructure products, and describes itself as the nation’s leading manufacturer of engineered water pipeline and infrastructure. The company grew from three steel pipe mills in Clackamas, Oregon, and now operates manufacturing facilities across the United States and Mexico. Its specialties include engineered steel water pipe and concrete pipe and precast products, with ISO 9001:2015-certified facilities.
ISO 9001:2015
McWane, LLCFounded in Birmingham in 1921 as the McWane Cast Iron Pipe Company, McWane is a family-owned and operated manufacturer of infrastructure products. It grew from its cast-iron pipe roots into a company making products for water distribution and plumbing, fire safety, and pressure-vessel applications, with manufacturing facilities across North America and around the world.ELMIRA, NY
Bull Moose Tube CompanyFor more than half a century, Bull Moose Tube Company has manufactured steel tube and pipe, with seven North American production facilities serving structural, mechanical, fire-suppression and infrastructure applications. The company is particularly known for its sprinkler pipe and for combining direct-form and round-to-shape manufacturing methods for hollow structural sections. All Bull Moose facilities are ISO 9001:2015 certified, and its technical team works with customers on demanding tubing and product-development challenges.MASURY, OH
McWane DuctileSince 1921, McWane Ductile has manufactured ductile iron pipe for water and wastewater infrastructure, pairing foundry production with project-specific fabrication services. A division of McWane Inc., the company operates three U.S. foundries in New Jersey, Ohio, and Utah and employs more than 1,000 people. Its Coshocton operation also produces ductile iron utility poles, including through a $50 million section-casting and annealing expansion completed in 2024.COSHOCOTON, OH
Westlake Pipe & FittingsWestlake Pipe & Fittings, a division of Westlake Corporation, manufactures PVC pipe and fittings for infrastructure and related applications. The company says it has supported infrastructure for more than 50 years and operates 23 manufacturing and distribution facilities across North America; it also pioneered Certa-Lok spline-lock technology.LEOLA, PA