Abrupt transition creates turbulence
An abrupt transition can create turbulence, noise, and pressure loss. Verify the transition length/taper before locking it in.
Stop if
- This transition changes from [size] to [size] over [length]. Is this transition acceptable, or do you want a longer/approved fitting?
Watch out
- Do not make a short chopped transition because it is easier to fit.
Check
- Compare the transition to the shop drawing or fitting detail.
- Check whether the size change is sudden instead of gradual.
- Look for noise-prone locations near VAVs, diffusers, fans, or elbows.
- Confirm the transition does not block access, dampers, or test ports.
- Ask before field-cutting or substituting a shorter transition.
Steps
- Compare the transition to the shop drawing or fitting detail.
- Check whether the size change is sudden instead of gradual.
- Look for noise-prone locations near VAVs, diffusers, fans, or elbows.
- Confirm the transition does not block access, dampers, or test ports.
- Ask before field-cutting or substituting a shorter transition.
Say this to your foreman
This transition changes from [size] to [size] over [length]. Is this transition acceptable, or do you want a longer/approved fitting?
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