Westlake Chemical Corporation (NYSE: WLK) acquired CertainTeed's Pipe & Foundations Group, manufacturer of many well-known industry product brands including Certa-Lok, Yelomine, CertaFlo, Certa-Com, C900 RJ/RJIB, Certa-Set, and StraightShot pipe and Form-a-Drain foundations. Our business will now operate under the name North American Specialty Products and is a wholly owned subsidiary of North American Pipe Corporation, in turn a wholly owned subsidiary of Westlake Chemical Corporation. North American Specialty Products is located at 993 Old Eagle School Rd Suite 416 in Wayne, PA 19087, telephone number (484) 253-4545