Test Hole Location for Static Pressure

How far downstream of elbow should I drill? What hole size for Pitot tube?

I'm checking test hole location for static pressure at [location]. I found small hole in ductwork with rubber grommet or plug for pressure measurement. How far downstream of elbow should I drill? What hole size for Pitot tube?

Airflow, Noise, Vibration & TAB 3rd Year YELLOW

Stop if

Hold point on test hole location for static pressure: I have the location, photo, drawing/detail, and what I checked. Who should verify before this gets cut, drilled, covered, lifted, connected, or signed off?

Watch out

Don't drill near fittings, dampers, or transitions. Don't use oversized holes. Don't leave open after testing.

Check

room/grid/area
photo of condition
drawing/detail or submittal
what I already checked
what is blocking progress

Say this to your foreman

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