Waterway drain covers are compliant to the latest Consumer Safety Product Commission requirements (CPSC). Listed and Certified and Tested in strict accordance to the requirements of ASME A112.19.8-2007and ASME A112.19.8a-2008 as defined in CPSC letter dated April 8, 2011. Certified by: Underwriters Laboratories, Inc., 2929 E. Imperial Highway, Suite 100, Brea, CA 92821-6729.