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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000065195-05-000051.txt : 20050804
<SEC-HEADER>0000065195-05-000051.hdr.sgml : 20050804
<ACCEPTANCE-DATETIME>20050804122247
ACCESSION NUMBER:		0000065195-05-000051
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050801
FILED AS OF DATE:		20050804
DATE AS OF CHANGE:		20050804

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Omega Flex, Inc.
		CENTRAL INDEX KEY:			0001317945
		STANDARD INDUSTRIAL CLASSIFICATION:	HEATING EQUIP, EXCEPT ELEC & WARM AIR & PLUMBING FIXTURES [3430]
		IRS NUMBER:				231948942
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		451 CREAMERY WAY
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341
		BUSINESS PHONE:		610-524-7272

	MAIL ADDRESS:	
		STREET 1:		451 CREAMERY WAY
		CITY:			EXTON
		STATE:			PA
		ZIP:			19341

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MESTEK INC
		CENTRAL INDEX KEY:			0000065195
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR COND & WARM AIR HEATING EQUIP & COMM & INDL REFRIG EQUIP [3585]
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51372
		FILM NUMBER:		05998449

	BUSINESS ADDRESS:	
		STREET 1:		260 N ELM ST
		CITY:			WESTFIELD
		STATE:			MA
		ZIP:			01085
		BUSINESS PHONE:		4135689571

	FORMER NAME:	
		FORMER CONFORMED NAME:	MESTA MACHINE CO
		DATE OF NAME CHANGE:	19850123
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-08-01</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001317945</issuerCik>
        <issuerName>Omega Flex, Inc.</issuerName>
        <issuerTradingSymbol>OFLX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000065195</rptOwnerCik>
            <rptOwnerName>MESTEK INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>260 NORTH ELM ST.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WESTFIELD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01085</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8732125</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The reporting person distributed all of the shares of Omega Flex, Inc. owned by the reporting person to its shareholders on a pro rata basis.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>J. Nicholas Filler, Sr. VP &amp; Secretary</signatureName>
        <signatureDate>2005-08-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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