Attributes . 13D and 13R: Fire Sprinkler Applications, CRN: Canadian Registration Number, CSA International: Canadian Standards Association, FM: FM Global, IAPMO: Uniform Plumbing Code, ICC: International Plumbing Code, NFPA 13, NSF/ANSI 372: Drinking Water System Components - Lead Content, NSF/ANSI 61: Drinking Water System Components - Health Effects, PHCC: National Standard Plumbing Code, UL: Underwriters Laboratories . Names