- AB&I Foundry
- Manufactures foundry cast iron soil pipe and fittings, pipe couplings.
- Atlantic States Cast Iron Pipe Company
- Manufacturers and suppliers of ductile iron pipe and fittings.
- Cambridge-Lee Industries
- Manufacturer and distributor of copper tube for water supply, air conditioning, refrigeration and a variety of commercial applications.
- Cerro Flow Products
- Manufacturer of world-class grade copper tube for the plumbing, HVAC, refrigeration, and industrial markets.
- Charlotte Pipe and Foundry Company
- Produces cast iron, PVC, ABS, and CPVC pipe and fittings for plumbing and industrial systems.
- Edmund A. Gray Company
- Manufacturer and distributor of quality pipe nipples and fittings.
- Fab Pipe Inc.
- Manufacturer of ductile iron and steel process piping products for water, wastewater, industrial and OEM applications.
- Felker Brothers Corporation
- Manufactures corrosion-resistant stainless steel products and fabricated piping systems.
- Watts Regulator Company
- Manufactures and sells an extensive line of flow control products for the water quality, residential plumbing and heating, commercial and OEM markets.
- Wheatland Tube Co.
- Manufacturer of steel pipe, steel tube, electrical conduit, sprinkler pipe, fence framework and mechanical tube, Made in the USA.
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