<PAGE>   1
                                                              Exhibit 10 (xiii)

                        AMERICAN STANDARD COMPANIES INC.
                              STOCK INCENTIVE PLAN

                      (As Amended through February 2, 1999)

                                   SECTION 1.

                                     PURPOSE

            The purpose of the Plan is to foster and promote the long-term
financial success of the Company and materially increase shareholder value by
(a) motivating superior performance by means of performance-related incentives,
(b) encouraging and providing for the acquisition of an ownership interest in
the Company by Employees, and (c) enabling the Company to attract and retain the
services of an outstanding management team upon whose judgment, interest and
special effort the successful conduct of its operations is largely dependent.

                                   SECTION 2.

                                   DEFINITIONS

            2.1 Definitions. Whenever used herein, the following terms shall
have the respective meanings et forth below:

            (a) "Act" means the Securities Exchange Act of 1934, as amended.

            (b) "Adjustment Event" shall mean any stock dividend, stock split or
      share combination of, or extraordinary cash dividend on, the Common Stock
      or recapitalization, reorganization, merger, consolidation, split-up,
      spin-off, combination, exchange of shares, warrants or rights offering to
      purchase Common Stock at a price substantially below Fair Market Value, or
      other similar event affecting the Common Stock of the Company.

            (c) "Board" means the Board of Directors of the Company.

            (d) "Cause" means a Participant's (i) willful and continued failure

<PAGE>   2

      substantially to perform his duties with the Company or any Subsidiary
      (other than any such failure resulting from incapacity due to reasonably
      documented physical or mental illness), after a demand for substantial
      performance is delivered to such Participant by the Chairman of the Board
      or any executive officer which specifically identifies the manner in which
      it is believed that such Participant has not substantially performed his
      duties, or (ii) the willful engaging by such Participant in illegal
      misconduct materially and demonstrably injurious to the Company or any
      Subsidiary or to the trustworthiness or effectiveness of such Participant
      in the performance of his duties. For purposes hereof, no act, or failure
      to act, on such Participant's part shall be considered "willful" unless
      done, or omitted to be done, by him not in good faith and without
      reasonable belief that his action or omission was in the best interest of
      the Company or a Subsidiary. Any act, or failure to act, based upon
      authority given pursuant to a resolution duly adopted by the Board or
      based upon the advice of counsel for the Company shall be conclusively
      presumed to be done, or omitted to be done, by such Participant in good
      faith and in the best interest of the Company or such Subsidiary.

            (e) "Change of Control" shall mean the occurrence of any of the
      following events:

                  (i) any person is or becomes the Beneficial Owner, directly or
            indirectly, of securities of the Company representing 15% or more of
            the combined voting power of the Company's then-outstanding
            securities (a "15% Beneficial Owner"); provided, however, that (a)
            the term "15% Beneficial Owner" shall not include any Beneficial
            Owner who has crossed such 15% threshold solely as a result of an
            acquisition of securities directly from the Company, or solely as a
            result of an acquisition by the Company of Company securities, until
            such time thereafter as such person acquires additional voting
            securities other than directly from the Company and, after giving
            effect to such acquisition, such person would constitute a 15%
            Beneficial Owner; and (b) with respect to any person eligible to
            file a Schedule 13G pursuant to Rule 13d-1(b)(1) under the Act with
            respect to Company securities (an "Institutional Investor"), there
            shall be excluded from the number of securities deemed to be
            beneficially owned by such person a number of securities
            representing not more than 10% of the combined voting power of the
            Company's then-outstanding securities;


                                      -2-
<PAGE>   3

                  (ii) during any period of two consecutive years beginning
            after December 1, 1996, individuals who at the beginning of such
            period constitute the Board together with those individuals who
            first become directors during such period (other than by reason of
            an agreement with the Company or the Board in settlement of a proxy
            contest for the election of directors) and whose election or
            nomination for election to the Board was approved by a vote of at
            least two-thirds of the directors then still in office who either
            were directors at the beginning of the period or whose election or
            nomination for election was previously so approved (the "Continuing
            Directors"), cease for any reason to constitute a majority of the
            Board;

                  (iii) the shareholders of the Company approve a merger,
            consolidation, recapitalization or reorganization of the Company, or
            a reverse stock split of any class of voting securities of the
            Company, or the consummation of any such transaction if shareholder
            approval is not obtained, other than such transaction which would
            result in at least 75% of the total voting power represented by the
            voting securities of the Company or the surviving entity outstanding
            immediately after such transaction being beneficially owned by
            persons who together owned at least 75% of the combined voting power
            of the voting securities of the Company outstanding immediately
            prior to such transaction, with the relative voting power of each
            such continuing holder compared to the voting power of each other
            continuing holder not substantially altered as a result of the
            transaction; provided that, for purposes of this paragraph (iii),
            (a) such continuity of ownership (and preservation of relative
            voting power) shall be deemed to be satisfied if the failure to meet
            such 75% threshold (or to preserve such relative voting power) is
            due solely to the acquisition of voting securities by an employee
            benefit plan of the Company or of such surviving entity or of any
            subsidiary of the Company or such surviving entity and (b) voting
            securities beneficially owned by such persons who receive them other
            than as holders of voting securities of the Company outstanding
            immediately prior to such transaction shall not be taken into
            account for purposes of determining whether such 75% threshold (or
            such relative voting power) is satisfied;


                                      -3-
<PAGE>   4

                  (iv) the shareholders of the Company approve a plan of
            complete liquidation or dissolution of the Company or an agreement
            for the sale or disposition of all or substantially all the assets
            of the Company unless following the completion of such liquidation
            or dissolution, or such sale or disposition, the 75% threshold (and
            relative voting power) requirements set forth in sub-paragraph (iii)
            above are satisfied; or

                  (v) any other event which the Committee determines shall
            constitute a Change of Control for purposes of this Plan;

      provided, however, that a Change of Control shall not be deemed to have
      occurred if one of the following exceptions applies:

                        (1) Unless a majority of the Continuing Directors and of
                  the Committee determine that the exception set forth in this
                  paragraph (1) shall not apply, none of the foregoing
                  conditions would have been satisfied but for one or more of
                  the following persons acquiring or otherwise becoming the
                  Beneficial Owner of securities of the Company: (A) any person
                  who has entered into a binding agreement with the Company,
                  which agreement has been approved by two-thirds of the
                  Continuing Directors, limiting the acquisition of additional
                  voting securities by such person, the solicitation of proxies
                  by such person or proposals by such person concerning a
                  business combination with the Company (a "Standstill
                  Agreement"); (B) any employee benefit plan, or trustee or
                  other fiduciary thereof, maintained by the Company or any
                  Subsidiary; (C) any Subsidiary; or (D) the Company.

                        (2) Unless a majority of the Continuing Directors and of
                  the Committee determine that the exception set forth in this
                  paragraph (2) shall not apply, none of the foregoing
                  conditions would have been satisfied but for the acquisition
                  by or of the Company of or by another entity (whether by the
                  merger or consolidation, the acquisition of stock or assets,
                  or otherwise) in exchange, in whole or in part, for securities
                  of the Company, provided that, immediately following such
                  acquisition, the Continuing Directors constitute a majority of
                  the Board, or a majority of the board of 


                                      -4-
<PAGE>   5

            directors of any other surviving entity, and, in either case, no
            agreement, arrangement or understanding exists at that time which
            would cause such Continuing Directors to cease thereafter to
            constitute a majority of the Board or of such other board of
            directors.

            Notwithstanding the foregoing, unless otherwise determined by a
      majority of the Continuing Directors, no Change of Control shall be deemed
      to have occurred with respect to a particular Participant if the Change of
      Control results from actions or events in which such Participant is
      involved in a capacity other than solely as an officer, employee or
      director of the Company.

            For purposes of the foregoing definition of Change of Control, the
      term "Beneficial Owner," with respect to any securities, shall mean any
      person who, directly or indirectly, has or shares the right to vote or
      dispose of such securities or otherwise has "beneficial ownership" of such
      securities (within the meaning of Rule 13d-3 and Rule 13d-5 (as such Rules
      are in effect on December 1, 1996) under the Act), including pursuant to
      any agreement, arrangement or understanding (whether or not in writing);
      provided, however, that (i) a person shall not be deemed the Beneficial
      Owner of any security as a result of any agreement, arrangement or
      understanding to vote such security (A) arising solely from a revocable
      proxy or consent solicited pursuant to, and in accordance with, the
      applicable provisions of the Act and the rules and regulations thereunder
      or (B) made in connection with, or otherwise to participate in, a proxy or
      consent solicitation made, or to be made, pursuant to, and in accordance
      with, the applicable provisions of the Act and the rules and regulations
      thereunder, in either case described in clause (A) or clause (B) above
      whether or not such agreement, arrangement or understanding is also then
      reportable by such person on Schedule 13D under the Act (or any comparable
      or successor report), and (ii) a person engaged in business as an
      underwriter of securities shall not be deemed to be the Beneficial Owner
      of any securities acquired through such person's participation in good
      faith in a firm commitment underwriting until the expiration of forty days
      after the date of such acquisition.

            f) "Change of Control Settlement Value" shall mean, with respect to
      a share of Common Stock, the excess of the Change of Control Stock Value
      over the option price of the Option covering such share of Common Stock,
      provided that, with respect to


                                      -5-
<PAGE>   6

      any Option which is an Incentive Stock Option immediately prior to the
      election to receive the Change of Control Settlement Value, the Change of
      Control Settlement Value shall not exceed the maximum amount permitted for
      such Option to continue to qualify as an Incentive Stock Option.

            (g) "Change of Control Stock Value" shall mean the value of a share
      of Common Stock determined as follows:

                  (i) if the Change of Control results from an event described
            in clause (iii) of the Change of Control definition, the highest per
            share price paid for shares of Common Stock of the Company in the
            transaction resulting in the Change of Control;

                  (ii) if the Change of Control results from an event described
            in clauses (i), (ii) or (v) of the Change of Control definition and
            no event described in clauses (iii) or (iv) of the Change of Control
            definition has occurred in connection with such Change of Control,
            the highest sale price of a share of Common Stock of the Company on
            any trading day during the 60 consecutive trading days immediately
            preceding and following the date of such Change of Control as
            reported on the New York Stock Exchange Composite Tape, or other
            national securities exchange on which the Common Stock is traded,
            and published in The Wall Street Journal; or

                  (iii) if the Change of Control results from an event described
            in clause (iv) of the Change of Control definition, the price per
            share at which shares of Common Stock are redeemed or exchanged by
            their holders in the transaction described in such clause (iv) or,
            if there has been no such redemption or exchange, the higher of the
            amounts determined in accordance with clause (i) or clause (ii) of
            this Change of Control Stock Value definition.

            (h) "Code" means the Internal Revenue Code of 1986, as amended.

            (i) "Committee" means the Management Development and Nominating
      Committee of the Board (or such other committee of the Board that the
      Board shall designate), which shall consist of two or more members, each
      of whom shall be a non-employee director within the meaning of Rule 16b-3,
      as promulgated under the Act and serving at the pleasure of the Board.
      Notwithstanding the foregoing, with respect to 


                                      -6-
<PAGE>   7

      Incentive Awards granted to non-employee directors, the Committee shall
      mean the entire Board.

            (j) "Common Stock" means the common stock of the Company, par value
      $0.01 per share.

            (k) "Company" means American Standard Companies Inc., a Delaware
      corporation, and any successor thereto.

            (l) "Disability" means a Participant's inability, due to reasonably
      documented physical or mental illness, for more than six months to perform
      his duties with the Company or a Subsidiary on a full time basis if,
      within 30 days after written notice of termination has been given to such
      Participant, he shall not have returned to the full time performance of
      his duties.

            (m) "Dividend Equivalents" means an amount equal to the cash
      dividends paid by the Company upon one share of Common Stock for each
      Restricted Unit awarded to a Participant in accordance with Section 7 of
      the Plan.

            (n) "Employee" means any officer or other key employee of the
      Company or any of its Subsidiaries, including any employee of a
      minority-owned joint venture.

            (o) "Fair Market Value" means, on any date, the average of the
      highest and lowest sales price reported for such day on a national
      exchange or the average of the highest and lowest bid and asked prices on
      such date as reported on a nationally recognized system of price
      quotation. In the event that there are no Common Stock transactions
      reported on such exchange or system on such date, Fair Market Value shall
      mean the closing price on the immediately preceding date on which Common
      Stock transactions were so reported.

            (p) "Incentive Award" means the award of an Option, a Stock
      Appreciation Right, a Restricted Unit, or Restricted Stock under the Plan
      and shall also include an award of Common Stock or Restricted Units made
      in conjunction with other incentive programs established by the Company.

            (q) "Option" means the right to purchase Common Stock at a stated
      price for a specified period of time. For purposes of the Plan, an Option
      may be either (i) an "Incentive Stock Option" with the meaning of Section
      422 of the Code or (ii) an Option 


                                      -7-
<PAGE>   8

      which is not an Incentive Stock Option (a "Non-Qualified Stock Option").

            (r) "Participant" means any Employee or any non-employee director of
      the Company designated by the Committee to receive an Incentive Award
      under the Plan.

            (s) "Plan" means the American Standard Companies Inc. Stock
      Incentive Plan, as set forth herein and as the same may be amended from
      time to time.

            (t) "Public Offering" means the Company's offering of Common Stock
      to the general public through a registration statement filed with the
      Securities and Exchange Commission that covers (together with prior
      effective registrations) not less than 15% of the shares of Common Stock
      outstanding at the closing of such offering on a fully diluted basis.

            (u) "Restricted Period" means the period during which Restricted
      Units or shares of Restricted Stock are subject to forfeiture or
      restrictions on transfer (if applicable) pursuant to Section 7 of the
      Plan.

            (v) "Restricted Stock" means Common Stock awarded to a Participant
      pursuant to the Plan which is subject to forfeiture and restrictions on
      transferability in accordance with Section 7 of the Plan.

            (w) "Restricted Unit" means a Participant's right to receive
      pursuant to the Plan one share of Common Stock at the end of a specified
      period of time, which right is subject to forfeiture in accordance with
      Section 7 of the Plan.

            (x) "Retirement" means termination of a Participant's employment on
      or after the date the Participant attains age 55 with 10 years of service.

            (y) "Stock Appreciation Right" means the right to receive a payment
      from the Company, in cash or Common Stock, in an amount determined under
      Section 6.12 of the Plan.

            (z) "Subsidiary" means any corporation or partnership in which the
      Company owns, directly or indirectly, 50% or more of the total combined
      voting power of all classes of stock of such corporation or of the capital
      interest or profits interest of such partnership.


                                      -8-
<PAGE>   9

            2.2. Gender and Number. Except when otherwise indicated by the
context, words in the masculine gender used in the Plan shall include the
feminine gender, the singular shall include the plural, and the plural shall
include the singular.

                                   SECTION 3.

                          ELIGIBILITY AND PARTICIPATION

            Participants in the Plan shall be those Employees and non-employee
directors selected by the Committee to participate in the Plan.

                                   SECTION 4.

                                 ADMINISTRATION

            4.1. Power to Grant and Establish Terms of Awards. The Committee
shall have the authority, subject to the terms of the Plan, to determine the
Participants to whom Incentive Awards shall be granted and the terms and
conditions of any and all Incentive Awards, including but not limited to the
number of shares of Common Stock to be covered by each Incentive Award, the time
or times at which Incentive Awards shall be granted, and the terms and
provisions of the instruments by which Options shall be evidenced; to designate
Options as Incentive Stock Options or Non-Qualified Stock Options; and to
determine the period of time during which restrictions on Restricted Stock or
Restricted Units shall remain in effect. The proper officers of the Company may
suggest to the Committee the Participants who should receive Incentive Awards.
The terms and conditions of each Incentive Award shall be determined by the
Committee at the time of grant, and such terms and conditions shall not be
subsequently changed in a manner which would be adverse to the Participant
without the consent of the Participant to whom such Incentive Award has been
granted. The Committee may establish different terms and conditions for
different Participants receiving Incentive Awards and for the same Participant
for each Incentive Award such Participant may receive, whether or not granted at
different times. The grant of any Incentive Award to any Participant shall
neither entitle such Participant to, nor disqualify him from, the grant of any
other Incentive Awards. Notwithstanding anything else contained in the Plan to
the contrary, the Committee may delegate, subject to such terms and conditions
as it shall determine, to any officer of the Company or to a committee of
officers of the 


                                      -9-
<PAGE>   10

Company the authority to grant Incentive Awards (and to make any and all
determinations related thereto) to Participants who are not subject to the
reporting requirements of Section 16(a) of the Act.

            4.2. Substitute Options. The Committee shall have the right, subject
to the consent of Participants to whom Options have been granted, to grant in
substitution for outstanding Options, replacement Options which may contain
terms more favorable to the Participant than the Options they replace,
including, without limitation, a lower exercise price (subject to Section 6.2),
and to cancel replaced Options.

            4.3. Administration. The Committee shall be responsible for the
administration of the Plan. Any Incentive Award granted by the Committee may be
subject to such conditions, not inconsistent with the terms of the Plan, as the
Committee shall determine. The Committee, by majority action thereof, is
authorized to prescribe, amend and rescind rules and regulations relating to the
Plan, to provide for conditions deemed necessary or advisable to protect the
interests of the Company to interpret the Plan and to make all other
determinations necessary or advisable for the administration and interpretation
of the Plan to carry out its provisions and purposes. Determinations,
interpretations or other actions made or taken by the Committee pursuant to the
provisions of the Plan shall be final, binding and conclusive for all purposes
and upon all persons. The Committee may consult with legal counsel, who may be
counsel to the Company, and shall not incur any liability for any action taken
in good faith in reliance upon the advice of counsel.

                                   SECTION 5.

                              STOCK SUBJECT TO PLAN

            5.1. Number. Subject to the provisions of Section 5.3, the number of
shares of Common Stock subject to Incentive Awards under the Plan may not exceed
12,604,475, provided that, no more than 7,604,475 of such shares may be granted
as Incentive Stock Options under the Plan. The shares to be delivered under the
Plan may consist, in whole or in part, of Common Stock held in treasury or
authorized but unissued Common Stock, not 


                                      -10-
<PAGE>   11

reserved for any other purpose.

            5.2. Canceled, Terminated, or Forfeited Awards. Any shares of Common
Stock subject to an Incentive Award which for any reason expires, or is
canceled, terminated or otherwise settled without the issuance of any Common
Stock shall again be available under the Plan.

            5.3. Adjustment in Capitalization. The aggregate number of shares of
Common Stock available for Incentive Awards under Section 5.1 or subject to
outstanding Incentive Awards and the respective prices and/or vesting criteria
applicable to outstanding Incentive Awards shall be proportionately adjusted to
reflect, as deemed equitable and appropriate by the Committee, an Adjustment
Event. To the extent deemed equitable and appropriate by the Committee, subject
to any required action by stockholders, in any merger, consolidation,
reorganization, liquidation, dissolution, or other similar transaction, any
Incentive Award granted under the Plan shall pertain to the securities and other
property to which a holder of the number of shares of Common Stock covered by
the Incentive Award would have been entitled to receive in connection with such
event.

            Any shares of stock (whether Common Stock, shares of stock into
which shares of Common Stock are converted or for which shares of Common Stock
are exchanged or shares of stock distributed with respect to Common Stock) or
cash or other property received with respect to any award of Restricted Stock or
Restricted Units granted under the Plan as a result of any Adjustment Event, any
distribution of property or any merger, consolidation, reorganization,
liquidation, dissolution or other similar transaction shall, except as provided
in Section 7.4 or as otherwise provided by the Committee at or after the date an
award of Restricted Stock or Restricted Units is made by the Committee, be
subject to the same terms and conditions, including restrictions on transfer, as
are applicable to such shares of Restricted Stock or Restricted Units and any
stock certificate(s) representing or evidencing any shares of stock so received
shall be legended in substantially the same manner as provided in Section 7.5
hereof.


                                      -11-
<PAGE>   12

                                   SECTION 6.

                                  STOCK OPTIONS

            6.1. Grant of Options. Options may be granted to Participants at
such time or times as shall be determined by the Committee. Options granted to
non-employee directors shall be in such amounts and intervals as determined by
the Board from time to time. Options granted under the Plan may be of two types:
(i) Incentive Stock Options and (ii) Non-Qualified Stock Options, except that no
Incentive Stock Option may be granted to a non-employee director or to any
Employee of a Subsidiary which is not a corporation. The date of grant of an
Option under the Plan will be the date on which the Option is awarded by the
Committee or, if so determined by the Committee, the date on which occurs any
event the occurrence of which is an express condition precedent to the grant of
the Option. The Committee shall determine the number of Options, if any, to be
granted to the Participant, provided that, in no event shall the number of
shares of Common Stock subject to any Options or related Stock Appreciation
Rights granted to any Participant during any 12 month period exceed 1,000,000
shares as such number may be adjusted pursuant to Section 5.3. Each Option shall
be evidenced by an Option agreement that shall specify the type of Option
granted, the exercise price, the duration of the Option, the number of shares of
Common Stock to which the Option pertains, and such other terms and conditions
not inconsistent with the Plan as the Committee shall determine.

            6.2. Option Price. Non-Qualified Stock Options and Incentive Stock
Options granted pursuant to the Plan shall have an exercise price which is not
less than the Fair Market Value on the date the Option is granted.

            6.3. Exercise of Options. Options awarded to a Participant under the
Plan shall be exercisable at such times and shall be subject to such
restrictions and conditions including the performance of a minimum period of
service or the satisfaction of performance goals, as the Committee may impose
either at or after the time of grant of such Options, subject to the Committee's
right to accelerate the exercisability of such Option in its discretion.
Notwithstanding the foregoing, unless otherwise determined by the Committee,
Options shall become exercisable in three equal installments on each of the
first three anniversaries of the date of grant. Except as may be provided in any
provision approved by the Committee 


                                      -12-
<PAGE>   13

pursuant to this Section 6.3, after becoming exercisable each installment shall
remain exercisable until expiration, termination or cancellation of the Option.
An Option may be exercised from time to time, in whole or in part, up to the
total number of shares of Common Stock with respect to which it is then
exercisable. Notwithstanding the foregoing, no Option shall be exercisable for
more than 10 years after the date on which it is granted.

            6.4. Payment. The Committee shall establish procedures governing the
exercise of Options, which shall require that written notice of exercise be
given and that the Option price be paid in full at the time of exercise (i) in
cash or cash equivalents, (ii) in the discretion of the Committee, in shares of
Common Stock which have been owned by the Participant for at least six months'
(or such greater or lesser period as the Committee shall determine) having a
Fair Market Value on the date of exercise equal to such Option price or in a
combination of cash and Common Stock or (iii) in accordance with such procedures
or in such other form as the Committee shall from time to time determine. As
soon as practicable after receipt of a written exercise notice and payment of
the exercise price in accordance with this Section 6.4, the Company shall
deliver to the Participant a certificate or certificates representing the
acquired shares of Common Stock.

            6.5. Incentive Stock Options. Notwithstanding anything in the Plan
to the contrary, no term of the Plan relating to Incentive Stock Options shall
be interpreted, amended or altered, nor shall any discretion or authority
granted under the Plan be so exercised, so as to disqualify the Plan under
Section 422 of the Code, or, without the consent of any Participant affected
thereby, to cause any Incentive Stock Option previously granted to fail to
qualify for the Federal income tax treatment afforded under Section 421 of the
Code.

            6.6. Settlement. At the time a Participant exercises an Option in
lieu of accepting payment of the exercise price of the Option and delivering the
number of shares of Common Stock for which the Option is being exercised, the
Committee may direct that the Company either (i) pay the Participant a cash
amount, or (ii) issue a lesser number of shares of Common Stock having a Fair
Market Value on the date of exercise, equal to the amount, if any, by which the
aggregate Fair Market Value of the shares of Common Stock as to which the 


                                      -13-
<PAGE>   14

Option is being exercised exceeds the aggregate exercise price for such shares,
based on such terms and conditions as the Committee shall establish.

            6.7. Termination of Employment Due to Retirement. Unless otherwise
determined by the Committee at the time of grant, in the event a Participant's
employment with the Company or a Subsidiary terminates by reason of Retirement,
any Options granted to such Participant which are exercisable at the date of
such Participant's termination of employment may be exercised at any time prior
to three (3) years following the Participant's termination of employment or the
expiration of the term of the Options, whichever period is shorter.

            6.8. Termination of Employment Due to Death or Disability. Unless
otherwise determined by the Committee at the time of grant, in the event a
Participant's employment with the Company or a Subsidiary terminates by reason
of death or Disability, any Options granted to such Participant which are
exercisable at the date of such Participant's termination of employment may be
exercised by the Participant or the Participant's designated beneficiary, and if
none is named, in accordance with Section 10.2, at any time prior to one (1)
year following the Participant's termination of employment or the expiration
date of the term of the Options, whichever period is shorter.

            6.9. Termination of Employment for Cause. Unless otherwise
determined by the Committee at the time of grant, in the event a Participant's
employment with the Company or a Subsidiary is terminated for Cause, all Options
granted to such Participant which are then outstanding (whether or not
exercisable prior to the date of such termination) shall be forfeited.

            6.10. Termination of Employment for Any Other Reason. Unless
otherwise determined by the Committee at or after the time of grant, in the
event a Participant's employment with the Company or a Subsidiary terminates for
any reason other than one described in Section 6.7, 6.8 or 6.9, any Options
granted to such Participant which are exercisable at the date of such
Participant's termination of employment shall be exercisable at any time prior
to 90 days following such Participant's termination of employment or the


                                      -14-
<PAGE>   15

expiration of the term of such Options, whichever period is shorter.

            6.11. Committee Discretion. Notwithstanding anything else contained
in this Section 6 to the contrary, the Committee may permit all or any portion
of any Options to be exercised following a Participant's termination of
employment for any reason on such terms and subject to such conditions as the
Committee shall determine for a period up to and including, but not beyond, the
expiration of the term of such Options.

            6.12. Stock Appreciation Rights. The Committee may, in its
discretion, include in any Option, either at the time the Option is granted or
thereafter at any time prior to the exercise, termination or expiration of the
Option, a right of the Participant to elect, in lieu of purchasing any shares of
Common Stock in respect of which such Option is exercisable at any time, to
relinquish his Option with respect to any and all of such shares of Common Stock
and to receive from the Company a payment, in cash or Common Stock, equal to the
amount by which (i) the product of (x) the Fair Market Value of a share of
Common Stock on the date of such election multiplied by (y) the number of shares
of Common Stock as to which the Participant shall have made such election
exceeds (ii) the total exercise price for that number of shares of Common Stock
under the terms of such Option. If the Participant shall exercise Stock
Appreciation Rights appertaining to any Option, such Option shall thereafter
remain exercisable, according to its term, only with respect to the number of
shares of Common Stock as to which it would otherwise be exercisable less the
number of shares of Common Stock with respect to which such Stock Appreciation
Rights have been exercised. Each Stock Appreciation Right shall be subject to
the same terms and conditions as the related Option and shall be exercisable
only to the extent the related Option is exercisable.

                                   SECTION 7.

                      RESTRICTED STOCK AND RESTRICTED UNITS

            7.1. Grant of Restricted Stock and Restricted Units. Any award made
hereunder of Restricted Stock or Restricted Units shall be subject to the terms
and conditions of the Plan and to any other terms and conditions not
inconsistent with the Plan (including, but not 


                                      -15-
<PAGE>   16

limited to, requiring the Participant to pay the Company an amount equal to the
par value per share for each share of Restricted Stock awarded) as shall be
prescribed by the Committee in its sole discretion. As determined by the
Committee, with respect to an award of Restricted Stock, the Company shall
either (i) transfer or issue to each Participant to whom an award of Restricted
Stock has been made the number of shares of Restricted Stock specified by the
Committee or (ii) hold such shares of Restricted Stock for the benefit of the
Participant for the Restricted Period. In the case of an award of Restricted
Units, no shares of Common Stock shall be issued at the time an award is made,
and the Company shall not be required to set aside a fund for the payment of
such award.

            7.2. Restrictions on Transferability. Shares of Restricted Stock may
not be sold, assigned, transferred, pledged, hypothecated or otherwise
encumbered by the Participant during the Restricted Period, except as
hereinafter provided. Notwithstanding the foregoing, the Committee may permit
(on such terms and conditions as it shall establish) shares of Restricted Stock
to be transferred during the Restricted Period by the Participant to a member of
the Participant's immediate family or to a trust or similar vehicle for the
benefit of such immediate family members, provided that any shares of Restricted
Stock so transferred shall remain subject to the provisions of this Section 7.

            7.3. Rights as a Shareholder. Except for the restrictions set forth
herein and unless otherwise determined by the Committee, the Participant shall
have all the rights of a shareholder with respect to such shares of Restricted
Stock, including but not limited to, the right to vote and the right to receive
dividends. A Participant shall not have any right, in respect of Restricted
Units awarded pursuant to the Plan, to vote on any matter submitted to the
Company's stockholders until such time as the shares of Common Stock
attributable to such Restricted Units have been issued. At the discretion of the
Committee, a Participant's Restricted Unit account may be credited with Dividend
Equivalents during the Restricted Period.

            7.4. Restricted Period. Unless the Committee shall otherwise
determine at or after the date an award of Restricted Stock or Restricted Units
is made to the Participant by the Committee, the Restricted Period shall
commence upon the date of grant and shall lapse with 


                                      -16-
<PAGE>   17

respect to the shares of Restricted Stock or Restricted Units on the third
anniversary of the date of grant, unless sooner terminated as otherwise provided
herein. Without limiting the generality of the foregoing, the Committee may
provide for termination of the Restricted Period upon the achievement by the
Participant of performance goals specified by the Committee at the date of
grant. The determination of whether the Participant has achieved such
performance goals shall be made by the Committee in its sole discretion.

            7.5. Legend. Each certificate issued to a Participant in respect of
shares of Restricted Stock awarded under the Plan shall be registered in the
name of the Participant and Shall bear the following (or similar) legend:

            "The shares of stock represented by this certificate are subject to
      the terms and conditions contained in the American Standard Companies Inc.
      Stock Incentive Plan and may not be sold, pledged, transferred, assigned,
      hypothecated or otherwise encumbered in an manner (except as provided in
      Section 7.2 of the Plan) until ________________."

            7.6. Death, Disability or Retirement. Unless the Committee shall
otherwise determine at the date of grant, if a Participant ceases to be employed
by the Company or any Subsidiary by reason of death, Disability or Retirement,
the Restricted Period will lapse as to a pro rated portion of the shares of
Restricted Stock and Restricted Units transferred or issued to such Participant
under the Plan based on the number of days the Participant actually worked since
the date the shares of Restricted Stock or Restricted Units were granted (or in
the case of an award which becomes vested in installments, since the date, if
any, on which the last installment of such Restricted Stock or Restricted Units
became vested); provided that, in the case of an award with respect to which the
restrictions will lapse, if at all, based on the attainment of performance goals
or targets, such vesting shall be deferred until the end of the applicable
performance period and be based on that number of shares of Restricted Stock or
Restricted Units, if any, that would have been earned based on the attainment or
partial attainment of such performance goals or targets. Any shares of
Restricted Stock or Restricted Units as to which the Restricted Period has not
lapsed at the date of a Participant's termination of employment by reason of
death, Disability or Retirement (or which do not become vested


                                      -17-
<PAGE>   18

after such date under the preceding sentence) shall revert back to the Company
upon such Participant's termination of employment (or, if applicable, such
deferred vesting date).

      7.7. Termination of Employment. Unless the Committee shall otherwise
determine at or after the date of grant, if a Participant ceases to be employed
by the Company or any Subsidiary for any reason other than those specified in
Section 7.6 at any time prior to the date when the Restricted Period lapses, all
shares of Restricted Stock held by the Participant shall revert back to the
Company and all Restricted Units and any Dividend Equivalents credited to such
Participant shall be forfeited upon the Participant's termination of employment.

      7.8. Issuance of New Certificates; Settlement of Restricted Units. Upon
the lapse of the Restricted Period with respect to any shares of Restricted
Stock, such shares shall no longer be subject to the restrictions imposed under
Section 7.2 and the Company shall issue or have issued new share certificates
without the legend described in Section 7.5 in exchange for those previously
issued. Upon the lapse of the Restricted Period with respect to any Restricted
Units, the Company shall deliver to the Participant, or the Participant's
beneficiary or estate, as provided in Section 10.2, one share of Common Stock
for each Restricted Unit as to which restrictions have lapsed and any Dividend
Equivalents credited with respect to such Restricted Units and any interest
thereon. The Committee may, in its sole discretion, elect to pay cash or part
cash and part Common Stock in lieu of delivering only Common Stock for
Restricted Units. If a cash payment is made in lieu of delivering Common Stock,
the amount of such cash payment for each share of Common Stock to which a
Participant is entitled shall be equal to the Fair Market Value of the Common
Stock on the date on which the Restricted Period lapsed with respect to the
related Restricted Unit.

      7.9. Performance Related Awards. Notwithstanding anything else contained
in the Plan to the contrary, unless the Committee otherwise determines at the
time of grant, any award of Restricted Shares or Restricted Units, or an award
of Common Stock or Restricted Units made in conjunction with other incentive
plans established by the Company, to an officer of the Company or a Subsidiary
who is subject to the reporting requirements of Section 16(a) of the Exchange
Act, other than an award which will vest solely on the basis of the passage of


                                      -18-
<PAGE>   19

time, shall become vested, if at all, upon the determination by the Committee
that performance objectives established by the Committee have been attained, in
whole or in part (a "Performance Award"), to the extent required to ensure that
the grant of such awards are deductible by the Company or such Subsidiary
pursuant to Section 162(m) of the Code. Such performance objectives shall be
determined over a measurement period or periods established by the Committee and
related to at least one of the following criteria, which may be determined
solely by reference to the performance of (i) the Company, (ii) a Subsidiary,
(iii) an affiliate of the Company, or (iv) a division or unit of any of the
foregoing or based on comparative performance of any of the foregoing relative
to other companies: (A) earnings per share; (B) revenues; (C) operating cash
flow; (D) operating earnings; (E) working capital; (F) inventory turnover rates;
(G) earnings to sales ratio; and (H) return on capital (the "Performance
Criteria"). The maximum number of shares of Common Stock that may be subject to
any such Performance Award in any 12 month period shall not exceed 500,000
shares, as such number may be adjusted pursuant to Section 5.3.

                                   SECTION 8.

                                CHANGE OF CONTROL

      8.1. Accelerated Vesting and Payment. In the event of a Change of Control,
the Restricted Period with respect to each share of Restricted Stock and each
Restricted Unit will lapse and each Option and Stock Appreciation Right shall
become immediately exercisable on the date of such Change of Control.

      8.2. Alternative Awards. Notwithstanding any provision of Section 6, any
Participant who holds on the date of a Change of Control an Option or Stock
Appreciation Right granted under this Plan shall be entitled to elect, during
the 60-days period immediately following such Change of Control, in lieu of
acquiring the shares of Common Stock covered by any such Option (or, in the case
of a Stock Appreciation Right, the amount of cash and Common Stock such
Participant would otherwise be entitled to receive upon the relinquishment of
the Option related to such Stock Appreciation Right), to receive, and the
Company shall be obligated to pay, the Change of Control Settlement Value with
respect to shares of Common Stock up to the number of shares covered by such
Option or Stock Appreciation Right, which amount shall be


                                      -19-
<PAGE>   20

paid in cash.

      8.3. No Amendment. Notwithstanding Section 9, the provisions of this
Section 8 may not be amended in any respect following a Change of Control.

                                   SECTION 9.

                AMENDMENT, MODIFICATION, AND TERMINATION OF PLAN

            The Board may at any time terminate or suspend the Plan, and from
time to time may amend or modify the Plan. No action of the Board may, without
the consent of a Participant alter or impair his rights under any previously
granted Incentive Award.

                                   SECTION 10.

                            MISCELLANEOUS PROVISIONS

      10.1. Nontransferability of Awards. Unless the Committee shall permit (on
such terms and conditions as it shall establish) an Incentive Award to be
transferred, no Incentive Award granted under the Plan may be sold, transferred,
pledged, assigned, or otherwise alienated or hypothecated, other than by will or
by the laws of descent and distribution. All rights with respect to any
Incentive Award granted to a Participant under the Plan shall be exercisable
during his lifetime only by such Participant or, if transferred as contemplated
by the previous sentence, a permitted transferee.

      10.2. Beneficiary Designation. Each Participant under the Plan may from
time to time name any beneficiary or beneficiaries (who may be named
contingently or successively) to whom any benefit under the Plan is to be paid
or by whom any right under the Plan is to be exercised in case of his death.
Each designation will revoke all prior designations by the same Participant,
shall be in a form prescribed by the Committee, and will be effective only when
filed by the Participant in writing with the Committee during his lifetime. In
the absence of any such designation, benefits remaining unpaid or Incentive
Awards outstanding at the Participant's death shall be paid to or exercised by
the Participant's surviving spouse, if any, or otherwise to 


                                      -20-
<PAGE>   21

or by his estate.

      10.3. No Guarantee of Employment or Participation. Nothing in the Plan
shall interfere with or limit in any way the right of the Company or any
Subsidiary to terminate any Participant's employment at any time, nor confer
upon any Participant any right to continue in the employ of the Company or any
Subsidiary or affiliate. No Employee or non-employee director shall have a right
to be selected as a Participant, or, having been so selected, to receive any
future Incentive Awards.

      10.4. Tax Withholding. The Company shall have the power to withhold, or
require a Participant to remit to the Company promptly upon notification of the
amount due, an amount sufficient to satisfy Federal, state and local withholding
tax requirements on with respect to any Incentive Award, and the Company may
defer payment of cash or issuance or delivery of Common Stock until such
requirements are satisfied. The Committee may, in its discretion, permit a
Participant to elect, subject to such conditions as the Committee shall impose
(i) to have Common Stock otherwise issuable or deliverable under the Plan
withheld by the Company or (ii) to deliver to the Company previously acquired
shares of Common Stock, in each case, having a Fair Market Value sufficient to
satisfy all or part of the Participant's estimated total Federal, state and
local tax obligation associated with the transaction.

      10.5. Indemnification. Each person who is or shall have been a member of
the Committee or of the Board shall be indemnified and held harmless by the
Company against and from any loss, cost, liability, or expense that may be
imposed upon or reasonably incurred by him in connection with or resulting from
any claim, action, suit, or proceeding to which he may be made a party or in
which he may be involved by reason of any action taken or failure to act under
the Plan and against and from any and all amounts paid by him in settlement
thereof, with the Company's approval, or paid by him in satisfaction of any
judgment in any such action, suit or proceeding against him, provided he shall
give the Company an opportunity, at its own expense, to handle and defend the
same before he undertakes to handle and defend it on his own behalf. The
foregoing right of indemnification shall not be exclusive and shall be
independent of any other rights of indemnification to which such persons may be
entitled under


                                      -21-
<PAGE>   22

the Company's Articles of Incorporation or By-laws, by contract, as a matter of
law, or otherwise.

      10.6. No Limitation on Compensation. Nothing in the Plan shall be
construed to limit the right of the Company to establish other plans or to pay
compensation to its employees in cash or property, in a manner which is not
expressly authorized under the Plan.

      10.7. Requirements of Law. The granting of Incentive Awards and the
issuance of shares of Common Stock shall be subject to all applicable laws,
rules, and regulations, and to such approvals by any governmental agencies or
national securities exchanges as may be required.

      10.8. Governing Law. The Plan, and all agreements hereunder, shall be
construed in accordance with and governed by the laws of the State of Delaware.

      10.9. No Impact On Benefits. Incentive Awards granted under the Plan are
not compensation for purposes of calculating an Employee's rights under any
employee benefit plan.

      10.10. Securities Law Compliance. Instruments evidencing Incentive Awards
may contain such other provisions, not inconsistent with the Plan, as the
Committee deems advisable, including (i) a provision limiting the period during
which Stock Appreciation Rights could be exercised to the extent required in
order to avoid the application of Section 16(b) of the Act in the case of
officers of the Company and (ii) a requirement that the Participant represent to
the Company in writing, when an Incentive Award is granted or when he receives
shares with respect to such Award (or at such other time as the Committee deems
appropriate) that he is accepting such Incentive Award, or receiving or
acquiring such shares (unless they are then covered by a Securities Act of 1933
registration statement), for his own account for investment only and with no
present intention to transfer, sell or otherwise dispose of such shares except


                                      -22-
<PAGE>   23

such disposition by a legal representative as shall be required by will or the
laws of any jurisdiction in winding up the estate of the Participant. Such
shares shall be transferable only if the proposed transfer shall be permissible
pursuant to the Plan and if, in the opinion of counsel satisfactory to the
Company, such transfer at such time will be in compliance with applicable
securities laws.

      10.11 Term of Plan. The Plan shall be effective upon its adoption by the
Board and approval by the holders of the Common Stock, provided, however, that
in no event shall the Plan become effective until immediately prior to the
occurrence of a Public Offering. The Plan shall expire on the tenth anniversary
of the date on which it is adopted by the Board (except as to Incentive Awards
outstanding on that date), unless sooner terminated pursuant to Section 9.


                                      -23-
<PAGE>   24
                                                               Exhibit 10(xiii)

                        AMERICAN STANDARD COMPANIES INC.

                              STOCK INCENTIVE PLAN

                                    ADDENDUM

                                 UNITED KINGDOM

For Participants based in the United Kingdom, the following Sections of the Plan
shall be revised as follows:

      2.1.n "Employee means any officer or other key employee of the Company or
any of its Subsidiaries.

      2.1.aa "Subsidiary" means any corporation in which the Company owns,
directly or indirectly, a majority of the voting rights.

      10.1 Non-transferability of Awards. Unless the Committee shall permit (on
such terms and conditions as it shall establish) an Incentive Award to be
transferred, no Incentive Award granted under the plan may be sold, transferred,
pledged, assigned or otherwise alienated or hypothecated, other than by will or
the intestacy rules, provided always that any such transfer may only be to a
qualifying person as defined by Regulation 7(12) of the Public Offers of
Securities Regulations 1995. All rights with respect to any Incentive Award
granted to a Participant under the Plan shall be exercisable during his lifetime
only by such Participant, or if transferred as contemplated by the previous
sentence, a permitted transferee.

      10.2 Beneficiary Designation. Each Participant under the Plan may from
time to time name any beneficiary or beneficiaries (who may be named
contingently or successively) to whom any benefit under the Plan is to be paid
or by whom any right under the Plan is to be exercised in case of such
Participant's death. Each designation shall revoke all prior designations by the
same Participant, shall be in a form prescribed by the Committee, and shall be
effective only when filed by the Participant in writing with the Committee
during such Participant's lifetime. In the absence of any such designation,
benefits remaining unpaid or Incentive Awards outstanding at the Participant's
death shall be paid or exercised by the Participant's spouse, if any, or
otherwise to or by the Participant's estate; provided always that any right
under the Plan may be exercised only by the personal representatives of the
Participant (being either the executors of his will to whom a valid grant of
probate has been 


                                      -1-
<PAGE>   25

made or if such Participant dies intestate the duly appointed administrator(s)
of such Participant's estate) who have provided to the Committee evidence of
their appointment as such, or any other qualifying person as defined by
Regulation 7(12) of the Public Offers of Securities Regulation 1995, and any
reference in the Plan to "designated beneficiary" shall be construed
accordingly.


                                      -2-

<PAGE>   26
                                                              Exhibit 10 (xiii)

                        AMERICAN STANDARD COMPANIES INC.

                              STOCK INCENTIVE PLAN

                                    ADDENDUM

                                     FRANCE

Options may be granted under this Addendum to Participants based in France as
follows:

1)    Notwithstanding any other provision of the Plan, options granted to any
      Participant holding shares representing 10% or more of the Company's
      capital will not be deemed to have been granted pursuant to this Addendum.

2)    Notwithstanding any other provision of the Plan, any option whose exercise
      price at the time of the grant of the option is less than 80% of the
      arithmetical average of the market value of a share on the 20 daily
      sessions next preceding the related date of grant, rounded up, shall not
      be deemed to have been granted under this Addendum.

3)    Notwithstanding any other provision of the Plan, the maximum delay to
      grant options relating to shares that will not be repurchased by the
      Company is 5 years after the date of the Company shareholders meeting
      which authorized the grant of options under the Plan.

4)    Notwithstanding any other provisions of the Plan, the exercise price of an
      option shall be adjusted only upon the occurrence of the events specified
      under the July 24, 1966 corporate law - section 208-5 in accordance with
      French law.

5)    Notwithstanding any other provision of the Plan, upon the death of a
      French Participant, to the extent an option was exercisable by such
      Participant at the date of death, all such options shall remain
      exercisable for a period of six months from the date of the French
      participant's death.


                                      -1-