1. 3M Company
2. Al Kafaah LLC
3. Aquasana Inc.
4. BWT Holding GmbH
5. Calgon Carbon Corporation
6. Culligan International
7. Danaher Corporation
8. Dow Chemical Company
9. DuPont Inc.
10. General Electric Company
11. Honeywell International Inc.
12. Jason’s Water Softeners
13. Pentair PLC
14. Samco Technologies Inc.
15. Watts Water Technologies Inc.