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.