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  <xs:element id="mwa_InvestmentFundContributionForNMTC" abstract="false" name="InvestmentFundContributionForNMTC" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_SubCDELoanFromNMTC" abstract="false" name="SubCDELoanFromNMTC" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_PortfolioOptimizationCosts" abstract="false" name="PortfolioOptimizationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_ContractWithCustomerLiabilityIncreaseFromDeferralOfRevenue" abstract="false" name="ContractWithCustomerLiabilityIncreaseFromDeferralOfRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_DeferredRevenueTransferredInPortfolioOptimizationActivities" abstract="false" name="DeferredRevenueTransferredInPortfolioOptimizationActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_IncomeTaxInformationTable" abstract="true" name="IncomeTaxInformationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="mwa_IncomeTaxInformationLineItems" abstract="true" name="IncomeTaxInformationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mwa_SwingLineLoansMember" abstract="true" name="SwingLineLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_LettersOfCreditOutstandingMember" abstract="true" name="LettersOfCreditOutstandingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_DebtInstrumentCovenantScenarioAxis" abstract="true" name="DebtInstrumentCovenantScenarioAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="mwa_DebtInstrumentCovenantScenarioDomain" abstract="true" name="DebtInstrumentCovenantScenarioDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_LineOfCreditFacilityBorrowingBasePercentageOfEligibleAccountsReceivable" abstract="false" name="LineOfCreditFacilityBorrowingBasePercentageOfEligibleAccountsReceivable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mwa_LineOfCreditFacilityBorrowingBasePercentageOfEligibleInventory" abstract="false" name="LineOfCreditFacilityBorrowingBasePercentageOfEligibleInventory" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mwa_LineOfCreditFacilityBorrowingBasePercentageOfNetOrderlyLiquidationValueOfEligibleInventory" abstract="false" name="LineOfCreditFacilityBorrowingBasePercentageOfNetOrderlyLiquidationValueOfEligibleInventory" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mwa_DebtInstrumentThresholdForUnusedCommitmentFeePercentageOfAggregateRevolvingCommitments" abstract="false" name="DebtInstrumentThresholdForUnusedCommitmentFeePercentageOfAggregateRevolvingCommitments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mwa_MaximumExcessAvailabilityLevelAtWhichFinancialMaintenanceCovenantsWouldApply" abstract="false" name="MaximumExcessAvailabilityLevelAtWhichFinancialMaintenanceCovenantsWouldApply" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_LineOfCreditFacilityCovenantPercentOfLoanCap" abstract="false" name="LineOfCreditFacilityCovenantPercentOfLoanCap" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mwa_OutstandingLettersOfCredit" abstract="false" name="OutstandingLettersOfCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_OutstandingLetterOfCreditAccruedFeesAndExpenses" abstract="false" name="OutstandingLetterOfCreditAccruedFeesAndExpenses" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_PotentialIncreaseInSizeOfCreditFacility" abstract="false" name="PotentialIncreaseInSizeOfCreditFacility" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_DebtInstrumentRedemptionPriceUponChangeInControlPercentage" abstract="false" name="DebtInstrumentRedemptionPriceUponChangeInControlPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mwa_DefinedBenefitPlanNetPeriodicBenefitCostotherthanServiceCost" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostotherthanServiceCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_AccruedRebate" abstract="false" name="AccruedRebate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_WaterFlowSolutionsMember" abstract="true" name="WaterFlowSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_WaterManagementSolutionsMember" abstract="true" name="WaterManagementSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_CentralRegionMember" abstract="true" name="CentralRegionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_NortheastRegionMemberMember" abstract="true" name="NortheastRegionMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_WesternRegionMember" abstract="true" name="WesternRegionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_OtherInternationalLocationsMember" abstract="true" name="OtherInternationalLocationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_MuellerCoMember" abstract="true" name="MuellerCoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_MuellerTechnologiesMember" abstract="true" name="MuellerTechnologiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_CybersecurityIncidentPutativeClassActionMember" abstract="true" name="CybersecurityIncidentPutativeClassActionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_CobbCountyBoardOfCommissionersVsSheaTraylorMember" abstract="true" name="CobbCountyBoardOfCommissionersVsSheaTraylorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_SuretyBonds" abstract="false" name="SuretyBonds" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mwa_O2026Q2DividendsMember" abstract="true" name="O2026Q2DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_PaulMcAndrewMember" abstract="true" name="PaulMcAndrewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mwa_ChristineOrtizMember" abstract="true" name="ChristineOrtizMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
