FOREWORD This addendum adds wording to clarify that the upperelement portion of the water-heater tank is always heated to 57??(135?? at the conclusion of a water heating test@ and to correct for any net change in average tank temperature. Note: In this addendum@ changes to the current standard are indicated in the text by underlining (for additions) and(for deletions) unless the instructions specifically mention some other means of indicating the changes.