Fitting installed backwards causing poor performance
A backwards fitting can fit perfectly and still perform badly. Verify airflow direction and fitting orientation before sealing.
Watch out
- Do not assume symmetrical-looking fittings work either way.
Check
- Identify fitting type and intended airflow direction.
- Look for throat/heel, turning vanes, tap/scoop, or transition direction.
- Compare to shop drawing or layout mark.
- Check served branch/device before sealing.
- Ask before flipping, cutting, or leaving it.
Steps
- Identify fitting type and intended airflow direction.
- Look for throat/heel, turning vanes, tap/scoop, or transition direction.
- Compare to shop drawing or layout mark.
- Check served branch/device before sealing.
- Ask before flipping, cutting, or leaving it.
Say this to your foreman
This fitting may be backwards at [location]. Can you verify airflow direction and fitting orientation before I seal it?
More in Airflow, Noise, Vibration & TAB