| | | | | | | | | | | | | | |
| Entity | | State of incorporation or organization | | Doing business as |
| CAM Valves and Automation, LLC | | Kansas | | Pratt Industrial |
| Echologics B.V. | | Netherlands | | N/A |
| Echologics, LLC | | Delaware | | Delaware Echologics, LLC |
| | | | Echologics Delaware, LLC |
| | | | Echologics of Delaware, LLC |
| Echologics Pte. Ltd. | | Singapore | | N/A |
| Henry Pratt Company, LLC | | Delaware | | Hydro Gate |
| | | | Lined Valve Company |
| | | | Milliken Valve |
| Henry Pratt International, LLC | | Delaware | | N/A |
| i2O Water Ltd | | United Kingdom | | N/A |
| i2O Water International Holdings Limited | | United Kingdom | | N/A |
| i2O Water Latinoamérica S.A.S. | | Colombia | | N/A |
| i2O Water Malaysia Sdn. Bhd. | | Malaysia | | N/A |
| James Jones Company, LLC | | Delaware | | James Jones Company of Delaware, LLC |
| Jingmen Pratt Valve Co., Ltd. | | People’s Republic of China | | N/A |
| Krausz Industries Development Ltd. | | Israel | | N/A |
| Krausz Industries Ltd. | | Israel | | N/A |
| Krausz USA Inc. | | Delaware | | Krausz Industries, Inc. |
| Mueller Canada Holdings Corp. | | Canada | | N/A |
| Mueller Canada Ltd. | | Canada | | Echologics |
| | | | Mueller Canada |
| | | | Mueller Canada Echologics |
| Mueller Co. International Holdings, LLC | | Delaware | | N/A |
| Mueller Co. LLC | | Delaware | | Mueller Manufacturing Company, LLC |
| | | | Mueller Company, LLC |
| | | | Mueller Co. LP |
| | | | Mueller Co. New York LLC |
| Mueller Denmark ApS | | Denmark | | N/A |
| Mueller FBM, Inc. | | Delaware | | N/A |
| Mueller Group Co-Issuer, Inc. | | Delaware | | N/A |
| Mueller Group, LLC | | Delaware | | Mueller Flow, LLC |
| | | | Mueller Group of Delaware, LLC |
| Mueller International Holdings Limited | | United Kingdom | | N/A |
| Mueller International, LLC | | Delaware | | Mueller International (N.H.) |
| Mueller Products and Solutions, LLC | | Delaware | | N/A |
| Mueller Property Holdings, LLC | | Delaware | | N/A |
| Mueller Service California, Inc. | | Delaware | | N/A |
| Mueller Service Co., LLC | | Delaware | | Mueller Service Co. of Delaware |