Charlotte Pipe and Foundry Co. manufactures cast-iron and plastic pipe and fittings, all made in the USA. Offering a broad range of DWV products, Charlotte Pipe notes it is the only manufacturer that produces a system of cast-iron, PVC, CPVC and ABS pipe and fittings. Headquartered in Charlotte, North Carolina, Charlotte Pipe has seven plants across the United States and employs 1,500 associates. Combining modern technology with 119 years of craftsmanship and experience, Charlotte Pipe and Foundry adds it has a proud legacy of commitment to the industry and its customers. Charlotte Pipe.