<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-02</periodOfReport>
    <issuer>
        <issuerCik>0001094286</issuerCik>
        <issuerName>WATER PIK TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>PIK</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001189169</rptOwnerCik>
            <rptOwnerName>MCCLELLAND CRAIG W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WATER PIK TECHNOLOGIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>23 CORPORATE PLAZA, SUITE 246</rptOwnerStreet2>
            <rptOwnerCity>NEWPORT BEACH</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92660</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2004-01-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>510</value><footnoteId id="F1"/></transactionShares><transactionPricePerShare><value>12.25</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>21154</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Common Stock granted in lieu of Director Retainer Fees, using 01/02/04 price, issued pursuant to 1999 Non-Employee Director Compensation Plan, as amended.</footnote></footnotes><remarks/><ownerSignature><signatureName>W. Craig McClelland, by Richard D. Tipton pursuant to Power of Attorney previously filed with SEC</signatureName><signatureDate>2004-01-05</signatureDate></ownerSignature></ownershipDocument>

