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                                                                    EXHIBIT 31.1

                                 CERTIFICATIONS

I, James P. Reilly, President and Chief Executive Officer, certify that:

1.    I have reviewed this Annual Report on Form 10-K of Cantel Medical Corp.;

2.    Based on my knowledge, this report does not contain any untrue
      statement of a material fact or omit to state a material fact necessary
      to make the statements made, in light of the circumstances under which
      such statements were made, not misleading with respect to the period
      covered by this report;

3.    Based on my knowledge, the financial statements, and other financial
      information included in this report, fairly present in all material
      respects the financial condition, results of operations and cash flows
      of the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officers and I are responsible for
      establishing and maintaining disclosure controls and procedures (as
      defined in Exchange Act Rules 13a-15(e) and 15d-15 (e)) for the
      registrant and we have:

      a)  Designed such disclosure controls and procedures, or caused such
          disclosure controls and procedures to be designed under our
          supervision, to ensure that material information relating to the
          registrant, including its consolidated subsidiaries, is made
          known to us by others within those entities, particularly during
          the period in which this report is being prepared;

      b)  Evaluated the effectiveness of the registrant's disclosure
          controls and procedures and presented in this report our
          conclusions about the effectiveness of the disclosure controls
          and procedures, as of the end of the period covered by this
          report based on such evaluation; and

      c)  Disclosed in this report any changes in the registrant's
          internal control over financial reporting that occurred during
          the registrant's most recent fiscal quarter (the registrant's
          fourth fiscal quarter in the case of an annual report) that has
          materially affected, or is reasonably likely to materially
          affect, the registrant's internal control over financial
          reporting; and

5.    The registrant's other certifying officers and I have disclosed, based
      on our most recent evaluation of internal control over financial
      reporting, to the registrant's auditors and the audit committee of
      registrant's board of directors (or persons performing the equivalent
      functions):

      a)  All significant deficiencies and material weaknesses in the
          design or operation of internal controls over financial
          reporting which are reasonably likely to adversely affect the
          registrant's ability to record, process, summarize and report
          financial information; and

      b)  Any fraud, whether or not material, that involves management or
          other employees who have a significant role in the registrant's
          internal controls over financial reporting.

Date:  October 29, 2003

By: /s/ James P. Reilly
    -------------------------------
James P. Reilly, President and Chief
Executive Officer (Principal Executive
Officer)