Pentair Water Treatment, of Chardon, Ohio, announces the ISO 9001 registration of its CodeLine fiberglass membrane housings division. ISO 9000 is recognized as the standard in manufacturing, promoting consistent quality practices across international borders. ISO 9001 adds the element of design to the stringent quality standards. CodeLine transferred its manufacturing and engineering operations from Escondido, Calif., to Chardon, Ohio, in February 2000. The new facilities are significantly improved and expanded.