Mueller Water Products (MWA) 10-Q 2012 Q3 Quarterly report

Exhibit 32.2

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The certification set forth below is being submitted in connection with the Quarterly Report on Form 10-Q of Mueller Water Products, Inc. (the “Report”) for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 (the "Exchange Act") and Section 1350 of Chapter 63 of Title 18 of the United States Code.

I, Evan L. Hart, Senior Vice President and Chief Financial Officer of Mueller Water Products Inc., certify that, to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Mueller Water Products, Inc.

Dated: August 9, 2012

/s/  Evan L. Hart

Evan L. Hart,

Senior Vice President and Chief Financial Officer