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                                                                    Exhibit 4.01

                         1997 EMPLOYEE STOCK OPTION PLAN
                                       OF
                              CANTEL MEDICAL CORP.

          (As adopted by the Board of Directors as of October 16, 1997
                 and by the stockholders on January 22, 1998 and
        amended on April 27, 1999, March 28, 2000 and September 6, 2001)

            1. THE PLAN. This 1997 Employee Stock Option Plan (the "Plan") is
intended to encourage ownership of stock of Cantel Medical Corp. (the
"Corporation") by specified employees of the Corporation and its subsidiaries
and to provide additional incentive for them to promote the success of the
business of the Corporation.

            2. STOCK SUBJECT TO THE PLAN. Subject to the provisions of Paragraph
14 hereof, the total number of shares of Common Stock, par value $.10 per share,
of the Corporation (the "Stock") which may be issued pursuant to Incentive Stock
Options, as defined by Section 422 of the Internal Revenue Code ("ISOs"), under
the Plan (the "Options") shall be 1,000,000. Such shares of Stock may be in
whole or in part, either authorized and unissued shares or treasury shares as
the Board of Directors of the Corporation (the "Board") shall from time to time
determine. If an Option shall expire or terminate for any reason without having
been exercised in full, the unpurchased shares covered thereby shall (unless the
Plan shall have been terminated) again be available for Options under the Plan.

            3. ADMINISTRATION OF THE PLAN. The Plan shall be administered by a
committee (the "Committee") composed of two or more non-employee members of the
Board which shall have plenary authority, in its discretion, to determine the
employees of the Corporation and its subsidiaries to whom Options shall be
granted ("Optionees"), the number of shares to be subject to each Option
(subject to the provisions of Paragraph 2), the option exercise price (the
"Exercise Price") (subject to the provisions of Paragraph 7), the vesting
schedule of each option and the other terms of each Option. The Board shall have
plenary authority, subject to the express provisions of the Plan, to interpret
the Plan, to prescribe, amend and rescind any rules and regulations relating to
the Plan and to take such other action in connection with the Plan as it deems
necessary or advisable. The interpretation and construction by the Board of any
provisions of the Plan or of any Option granted thereunder shall be final and no
member of the Board shall be liable for any action or determination made in good
faith with respect to the Plan or any Option granted thereunder by the
Committee.

            4. EMPLOYEES ELIGIBLE FOR OPTIONS. All employees of the Corporation
or its subsidiaries shall be eligible for Options. In making the determination
as to employees to whom Options shall be granted and as to the number of shares
to be covered by such Options, the Committee shall take into account the duties
of the respective employees, their present and potential

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contributions to the success of the Corporation and such other factors as it
shall deem relevant in connection with accomplishing the purpose of the Plan.

            5. TERM OF PLAN. The Plan shall terminate on, and no Options shall
be granted after October 15, 2007 provided that the Committee may at any time
terminate the Plan prior thereto.

            6. MAXIMUM OPTION GRANT. With respect to an Option granted to an
individual that is intended to qualify as an ISO, the aggregate fair market
value (determined as of the time the Option is granted) of the Stock with
respect to which such Option and all other ISOs granted to the individual
(whether under this Plan or under any other stock option plan of the Corporation
or any of its subsidiaries) are exercisable for the first time during a calendar
year may not exceed $100,000.

            7. EXERCISE PRICE. Each Option shall state the Exercise Price, which
shall be, in the case of ISOs, not less than 100% of the fair market value of
the Stock on the date of the granting of the Option, nor less than 110% in the
case of an ISO granted to an individual who, at the time the Option is granted,
is a 10% Holder (as hereinafter defined). The fair market value of shares of
Stock shall be determined by the Board and shall be (i) the closing price of the
Stock on the date of the granting of the Option as reported by NASDAQ or any
quotation reporting organizations, or (ii) if the Stock did not trade on such
date, the mean between the high bid and low asked prices.

            8. TERM OF OPTIONS. The term of each Option granted under this Plan
shall be for a maximum of ten years from the date of granting thereof, and a
maximum of five years in the case of an ISO granted to a 10% Holder, but may be
for a lesser period or be subject to earlier termination as hereinafter
provided.

            9. EXERCISE OF OPTIONS. An Option may be exercised from time to time
as to any part or all of the Stock to which the Optionee shall then be entitled,
provided, however, that an Option may not be exercised (a) as to less than 100
shares at any time (or for the remaining shares then purchasable under the
Option, if less than 100 shares), (b) prior to the expiration of at least six
months from the date of grant except in case of the death or disability of the
Optionee and (c) unless the Optionee shall have been in the continuous employ of
the Corporation or its subsidiaries from the date of the granting of the Option
to the date of its exercise, except as provided in Paragraphs 12 and 13. The
Exercise Price shall be paid in full at the time of the exercise of an Option
(i) in cash or (ii) by the transfer to the Corporation of shares of its Stock
with a fair market value (as determined by the Committee) equal to the purchase
price of the Stock issuable upon exercise of such Option. The holder of an
Option shall not have any rights as a stockholder with respect to the Stock
issuable upon exercise of an Option until certificates for such Stock shall have
been delivered to him after the exercise of the Option.

            10. NON-TRANSFERABILITY OF OPTIONS. An Option shall not be
transferable otherwise than by will or the laws of descent and distribution and
is exercisable during the lifetime of the employee only by him or his guardian
or legal representative.

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            11. FORM OF OPTION. Each Option granted pursuant to the Plan shall
be evidenced by an agreement (the "Option Agreement") which shall clearly
identify the status of the Options granted thereunder (i.e., an ISO ) and which
shall be in such form as the Committee shall from time to time approve. The
Option Agreement shall comply in all respects with the terms and conditions of
the Plan and may contain such additional provisions, including, without
limitation, restrictions upon the exercise of the Option, as the Committee shall
deem advisable.

            12. TERMINATION OF EMPLOYMENT. In the event that the employment of
an Optionee shall be terminated (otherwise by reason of death), such Option
shall be exercisable (to the extent that such Option was exercisable at the time
of termination of his employment) at any time prior to the expiration of a
period of time not exceeding three months after such termination, but not more
than ten years (five years in the case of an ISO granted to a 10% Holder) after
the date on which such Option shall have been granted. Nothing in the Plan or in
the Option Agreement shall confer upon an Optionee any right to be continued as
an employee of the Corporation or its subsidiaries or interfere in any way with
the right of the Corporation or any subsidiary to terminate or otherwise modify
the terms of an Optionee's employment, provided, however, that a change in an
Optionee's duties or position shall not affect such Optionee's Option so long as
such Optionee is still an employee of the Corporation or one of its
subsidiaries.

            13. DEATH OF OPTIONEE. In the event of the death of an Optionee, any
unexercised portion of such Optionee's Option shall be exercisable (to the
extent that such Option was exercisable at the time of his death) at any time
prior to the expiration of a period not exceeding three months after his death
but not more than ten years (five years in the case of an ISO granted to a 10%
Holder) after the date on which such Option shall have been granted and only by
such person or persons to whom such deceased Optionee's rights shall pass under
such Optionee's will or by the laws of descent and distribution.

            14. ADJUSTMENTS UPON CHANGES IN CAPITALIZATION. In the event of
changes in the outstanding Stock of the Corporation by reason of stock
dividends, splitups, recapitalizations, mergers, consolidations, combinations or
exchanges of shares, separations, reorganizations or liquidations, the number
and class of shares or the amount of cash or other assets or securities
available upon the exercise of any Option granted hereunder and the maximum
number of shares as to which Options may be granted to an employee shall be
correspondingly adjusted, to the end that the Optionee's proportionate interest
in the Corporation, any successor thereto or in the cash, assets or other
securities into which shares are converted or exchanged shall be maintained to
the same extent, as near as may be practicable, as immediately before the
occurrence of any such event. All references in this Plan to "Stock" from and
after the occurrence of such event shall be deemed for all purposes of this Plan
to refer to such other class of shares or securities issuable upon the exercise
of Options granted pursuant hereto.

            15. STOCKHOLDER AND STOCK EXCHANGE APPROVAL. This Plan is subject to
and no Options shall be exercisable hereunder until after the approval by the
holders of a majority of the

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Stock of the Corporation voting at a duly held meeting of the stockholders of
the Corporation within twelve months after the date of the adoption of the Plan
by the Board.

            16. AMENDMENT OF THE PLAN. The Board shall have complete power and
authority to modify or amend the Plan (including the form of Option Agreement)
from time to time in such respects as it shall deem advisable; provided,
however, that the Board shall not, without the approval of the votes represented
by a majority of the outstanding Stock of the Corporation present or represented
at a meeting duly held in accordance with the applicable laws of the
Corporation's jurisdiction of incorporation and entitled to vote at a meeting of
stockholders or by the written consent of stockholders owning stock representing
a majority of the votes of the corporation's outstanding stock, (i) increase the
maximum number of shares which in the aggregate are subject to Options under the
Plan (except as provided by Paragraph 14), (ii) extend the term of the Plan or
the period during which Options may be granted or exercised, (iii) reduce the
Exercise Price, in the case of ISOs below 100% (110% in the case of an ISO
granted to a 10% Holder) of the fair market value of the Stock issuable upon
exercise of Options at the time of the granting thereof, other than to change
the manner of determining the fair market value thereof, (iv) increase the
maximum number of shares of Stock for which any employee may be granted Options
under the Plan pursuant to Paragraph 6, (v) modify the requirements as to
eligibility for participation in the Plan, or (vi) amend the plan in any respect
which would cause such options to no longer qualify for ISO treatment pursuant
to the Internal Revenue Code. No termination or amendment of the Plan shall,
without the consent of the individual Optionee, adversely affect the rights of
such Optionee under an Option theretofore granted to him or under such
Optionee's Option Agreement.

            17. TAXES. The Corporation may make such provisions as it may deem
appropriate for the withholding of any taxes which it determines is required in
connection with any Options granted under the Plan. The Corporation may further
require notification from the Optionees upon any disposition of Stock acquired
pursuant to the exercise of Options granted hereunder.

            18. CODE REFERENCES AND DEFINITIONS. Whenever reference is made in
this Plan to a section of the Internal Revenue Code, the reference shall be to
said section as it is now in force or as it may hereafter be amended by any
amendment which is applicable to this Plan. The term "subsidiary" shall have the
meaning given to the term "subsidiary corporation" by Section 425(f) of the
Internal Revenue Code. The term "10% Holder" shall mean any person who, for
purposes of Section 422 of the Internal Revenue Code owns more than 10% of the
total combined voting power of all classes of stock of the employer corporation
or of any subsidiary corporation.

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                                                                    Exhibit 4.04

                  STOCK OPTION AGREEMENT made as of the 31st day of October
2001, by and between CANTEL MEDICAL CORP., a Delaware corporation with principal
offices located at 150 Clove Road, Little Falls, New Jersey, 07424 (the
"Company"), and JOSEPH L. HARRIS, 209 Edenton Place, Villanova, Pennsylvania
19085 (the "Optionee").

                   ------------------------------------------

                  The Optionee is presently an employee of the Company and is
hereby granted an option to purchase shares of the Company's Common Stock, par
value $.10 per share ("Common Stock"), on the terms and conditions set forth
below.

                    NOW, THEREFORE, in consideration of the premises and for
other good and valuable consideration, receipt of which is hereby acknowledged,
the Company hereby grants the Optionee the option to acquire shares of the
Common Stock of the Company upon the following terms and conditions:

                  1.  GRANT OF OPTION.

                      (a) The Company hereby grants to the Optionee the right
and option (the "Option") to purchase up to 50,000 shares of Common Stock (the
"Shares"), to be issued upon the exercise hereof, fully paid and non-assessable,
during the following periods: (i) 16,667 Shares may be purchased commencing
October 31, 2001; (ii)an additional 16,667 Shares may be purchased commencing
October 31,

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2002; and (iii) an additional 16,666 Shares may be purchased commencing October
31, 2003.

                      (b)  The Option granted hereby shall expire and
terminate at 5:00 p.m. local time in New York, New York on October 30, 2011 (the
"Expiration Date") at which time the Optionee shall have no further right to
purchase any Shares not then purchased.

                  2.  EXERCISE PRICE. The exercise price of the Option shall be
$22.45 per Share, and shall be payable in cash or by certified check; provided,
however, that in lieu of payment in full in cash or by such check, the exercise
price (or balance thereof) may be paid in full or in part by the delivery and
transfer to the Company of Common Stock already owned by the Optionee and having
a fair market value (as determined by the Board of Directors in its absolute
discretion) equal to the cash exercise price (or balance thereof) for the number
of Shares as to which the Option is being exercised. The Company shall pay all
original issue or transfer taxes on the exercise of the Option.

                  3.  EXERCISE OF OPTION. The Optionee shall notify the Company
by registered or certified mail, return receipt requested, addressed to its
principal office, as to the number of Shares which he desires to purchase under
the Option, which notice shall be accompanied by payment of the Option exercise
price therefor as specified in Paragraph 2 above. As soon as practicable after
the

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receipt of such notice, the Company shall, at its principal office or another
mutually convenient location, tender to the Optionee certificates issued in the
Optionee's name evidencing the Shares purchased by the optionee hereunder.

                  4.  CONDITIONS OF EXERCISE. The Optionee (or his legal
representative following the death of the Optionee) shall have the right to
exercise the Option only while the Optionee is an employee of the Company;
provided, however, the Option may be exercised at any time within twenty four
(24) months after the date the Optionee ceases to be an employee, but only to
the extent that it was exercisable upon such date of termination and in no event
after the Expiration Date.

                  5.  NON-ASSIGNABILITY OF OPTION. The Optionee may not give,
grant, sell, exchange, transfer legal title, pledge, assign or otherwise
encumber or dispose of the Option herein granted or any interest therein,
otherwise than by will or the laws of descent and distribution and, except as
provided in Paragraph 4 hereof, the Option shall be exercisable only by the
Optionee.

                  6.  THE SHARES AS INVESTMENT. By accepting the Option, the
Optionee agrees for himself, his heirs and legatees that any and all Shares
purchased upon the exercise thereof shall be acquired for investment and not for
distribution, and upon the issuance of any or all of the Shares subject to the
Option, the Optionee, or his heirs or legatees receiving such Shares, shall

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deliver to the Company a representation in writing that such Shares are being
acquired in good faith for investment and not for distribution. The Company may
place a "stop transfer" order with respect to such Shares with its transfer
agent and may place an appropriate restrictive legend on the certificate(s)
evidencing such Shares.

                  7.  RESTRICTION OF ISSUANCE OF SHARES. The Optionee shall, if
so requested by the Company, represent and agree, in writing and in such form as
the Company shall determine, that any securities purchased by the Optionee upon
the exercise of this Option are being purchased for investment and not with a
view to the distribution thereof, and shall make such other or additional
representations and agreements and furnish such information as the Company may
in its reasonable discretion deem necessary or desirable to assure compliance by
the Company, on terms acceptable to the Company, with provisions of the
Securities Act of 1933 and any other applicable legal requirements. If at any
time the Company shall reasonably determine that the listing, registration or
qualification of the Shares subject to this Option upon any securities exchange
or under any state or federal law, or the consent or approval of any
governmental regulatory body, are necessary or desirable in connection with the
issuance or purchase of the Shares subject thereto, this Option may not be
exercised in whole or in part unless such listing, registration, qualification,

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consent or approval shall have been effected or obtained free of any conditions
not acceptable to the Company. The Optionee shall have no rights against the
Company if this Option is not exercisable by virtue of the foregoing provision.
The certificate representing any securities issued pursuant to the exercise of
this Option may, at the discretion of the Company, bear a legend in
substantially the following form:

                               "The securities represented by this
                      certificate have not been registered under the
                      Securities Act of 1933. The securities have been
                      acquired for investment and may not be pledged or
                      hypothecated and may not be sold or transferred in
                      the absence of an effective Registration Statement
                      for the securities under the Securities Act of 1933
                      or an opinion of counsel to the Company that
                      registration is not required under said Act. In the
                      event that a Registration Statement becomes effective
                      covering the securities or counsel to the Company
                      delivers a written opinion that registration is not
                      required under said Act, this certificate may be
                      exchanged for a certificate free from this legend."

                  8.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION.

                      (a)  In the event of changes in the outstanding
Shares by reason of stock dividends, split-ups, recapitalizations, mergers,
consolidations, combination, exchanges of shares, separations, reorganizations,
liquidations and the like, the number and class of Shares or the amount of cash
or other assets or securities available upon the exercise of the Option and the
exercise price thereof shall be correspondingly adjusted by the Company, to the
end that the Optionee's proportionate interest in the Company, any successor
thereto or in the cash, assets or other

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securities into which shares are converted or exchanged shall be maintained to
the same extent, as near as may be practicable, as immediately before the
occurrence of any such event.

                      (b) Any adjustment in the number of Shares shall apply
proportionately to only the then unexercised portion of the Option. If
fractional Shares would result from any such adjustment, the adjustment shall be
revised to the next higher whole number.

                      (c) In case the Company is merged or consolidated with
another corporation, or the property or shares of the Company are acquired by
another corporation, or the Optionee is discharged other than for cause, the
exercise schedule set forth in paragraph 1 above shall be waived and all options
for the entire 50,000 shares of the Company's Common Stock shall be immediately
exercisable by the Optionee pursuant to paragraph 3 above.

                      For purposes of this paragraph (c), merger or
consolidation with another corporation or acquisition by another corporation
shall be defined as the acquisition by another corporation of more than forty
percent (40%) of any of the then outstanding stock, voting power, or assets of
the Company.

                  9.  NO RIGHTS AS SHAREHOLDERS. The Optionee shall have no
rights as a shareholder in respect of the Shares as to which the Option shall
not have been exercised and payment made as herein provided.

                  10. BINDING EFFECT. Except as herein otherwise expressly
provided, this Agreement shall be binding upon and shall inure to

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the benefit of the parties hereto, their legal representatives and assigns.

                  11. GOVERNING LAW. This Agreement shall be governed by and
construed in accordance with the laws of the State of New Jersey applicable to
agreements made and to be performed wholly within the State of New Jersey.

                  IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date and year first above written.

                                      CANTEL MEDICAL CORP.

                                      By: /s/ James P. Reilly
                                         ---------------------------------------
                                         James P. Reilly, President

                                      /s/ Joseph L. Harris
                                      ------------------------------------------
                                      Joseph L. Harris

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