Company: MWA
Filing Date: 2025-02-27
Form Type: S-8
Source: 0001350593-25-000019
Chunk: 0

Company: Mueller Water Products, Inc.
Filing Date: 2025-02-27
Form: S-8
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on February 27, 2025</div>

#### Registration No. 333-

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
<div align='center'>Washington, D.C. 20549</div>

#### FORM S-8

### REGISTRATION STATEMENT

#### UNDER

#### THE SECURITIES ACT OF 1933

#### MUELLER WATER PRODUCTS, INC.
<div align='center'>(Exact Name of Registrant as Specified in Its Charter)</div>

| Delaware                                                       |     |                          20-3547095 |
| (State or Other Jurisdiction of Incorporation or Organization) |     | -I.R.S. Employer Identification No. |
| 1200 Abernathy Road N.E., Suite 1200, Atlanta, GA              |     |                               30328 |
| (Address of Principal Executive Offices)                       |     |                           -Zip Code |

<div align='center'>Mueller Water Products, Inc. Third Amended and Restated 2006 Stock Incentive Plan

Mueller Water Products, Inc. Second Amended and Restated Employee Stock Purchase Plan

(Full title of the plan)</div>

#### Chason A. Carroll
<div align='center'>Senior Vice President, General Counsel and Corporate Secretary</div>

#### 1200 Abernathy Road N.E., Suite 1200

#### Atlanta GA 30328
<div align='center'>(Name and address of agent for service)

(770) 206-4200

(Telephone number, including area code, of agent for service)</div>

| Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. |     |                         |     |   |     |                           |     |   |     |   |
|                                                                                                                                                                                                                                                                                                                                                            |     | Large accelerated filer |     | ☑ |     | Accelerated filer         |     | ☐ |     |   |
|                                                                                                                                                                                                                                                                                                                                                            |     | Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐