Static field route #442

What do I do when tap too close to elbow/fitting?

Airflow/TAB Impacts From InstallationV136 field-polished — distinct TAB/airflow answer

A tap too close to an elbow can make the branch noisy or short on air. Measure the tap location and ask before cutting a new hole or leaving it.

Open in Field Rescue Open category

Field checklist

Measure from elbow/fitting face to takeoff centerline.
Check if the takeoff is in turbulent air right after a turn.
Look for whistle/noise, low CFM, or balancing problem at served diffuser.
Photo the tap location with tape visible.
Ask whether to relocate the tap, add turning/transition detail, or hold for direction.

Ask foreman

This takeoff is about [distance] from the elbow/fitting and the diffuser is noisy/short. Do you want the tap relocated or reviewed before we close it?

Do not

Do not keep adding mastic or adjusting the diffuser to hide a bad takeoff location.

Why it matters

Air is unstable right after a hard turn. A nearby tap can pull turbulent air and create noise or poor CFM.

Search words: tap too close elbow fitting branch takeoff whistle noise turbulence