Zurn Elkay Water Solutions (ZWS) S-8 Registration of securities for employees

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the Rexnord Corporation Performance Incentive Plan of our reports dated May 18, 2016, with respect to the consolidated financial statements and schedule of Rexnord Corporation and the effectiveness of internal control over financial reporting of Rexnord Corporation included in its Annual Report (Form 10-K) for the year ended March 31, 2016, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Milwaukee, Wisconsin

August 1, 2016