| CHINA TESTING & CERTIFICATION INTERNATIONAL GROUP SHAANXI CO., LTD | FENGDONG NEW CITY, CHINA |
| CRT LABORATORIES (CALIFORNIA RESIN TESTING) | ORANGE, CALIFORNIA UNITED STATES |
| CSA AMERICA TESTING AND CERTIFICATION LLC | CLEVELAND, OHIO UNITED STATES |
| FOUNDATION FOR CROSS-CONNECTION CONTROL & HYDRAULIC RESEARCH | LOS ANGELES, CALIFORNIA UNITED STATES |
| GUANGZHOU IAPMO LABORATORY CO., LTD. | GUANGZHOU, CHINA |
| HOME INNOVATION RESEARCH LABS | UPPER MARLBORO, MARYLAND UNITED STATES |
| IAPMO INDIA PRIVATE LIMITED | BENGALURU, KARNATAKA, KARNATAKA INDIA |
| IAPMO R & T LAB | ONTARIO, CALIFORNIA UNITED STATES |
| IAPMO RTL LAB NEW JERSEY | WILLIAMSTOWN, NEW JERSEY UNITED STATES |
| INTERTEK TESTING SERVICES SHENZHEN LTD. (GUANGZHOU BRANCH) | GUANGZHOU, GUANGDONG, CHINA |
| NATIONAL CENTRE FOR INSPECTION & TESTING OF DRAINAGE IRRIGATION & WATER SAV | HEFEI, ANHUI, CHINA |
| NSF INTERNATIONAL | ANN ARBOR, MICHIGAN UNITED STATES |
| QAI LABORATORIES INC. | TULSA, OKLAHOMA UNITED STATES |
| SHANGHAI ANHE ENVIRONMENTAL TESTING TECHNOLOGY CO LTD | SHANGHAI, CHINA |
| TAIWAN PLUMBING RESEARCH & TESTING LABORATORIES | TAICHUNG, TAICHUNG CITY TAIWAN |
