Reducer or Transition Installed Backward: Verify Airflow and End Sizes Before Final Connection

I traced airflow from the unit and this reducer is narrowing toward the equipment, opposite the spool. Can you confirm it is backward before we finish the joint?

Measuring, Field Verification & Layout Marks 2nd Year YELLOW

Watch out

Do not assume the larger end is always upstream or that a fitting is reversible because both connectors can be made to fit.

Check

current shop drawing or spool
piece mark and connector ends
photo of fitting and install space
verified dimensions and viewing direction
what has already been checked

Say this to your foreman

reducer or transition installed backward: verify airflow and end sizes before final connection fitting orientation & field verification reducer backwards transition installed wrong direction airflow upstream downstream duct fitting reversed confirm upstream and downstream, both end sizes, and the intended system direction before final connection. a fitting that physically connects can still be backward. i traced airflow from the unit and this reducer is narrowing toward the equipment, opposite the spool. can you confirm it is backward before we finish the joint?

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