Collars And Starting Collars
Unsealed, loose, wrong diameter
Green / Field Check1stBatch 5
What This Helps With
Unsealed, loose, wrong diameter
Apprentice words: collar
Trade terms: collar, starting collar, tap collar
Check First
Diameter, attachment screws, and sealant
What Not To Do
Oversize the trunk hole
What can go wrong: Leaving collar unsealed
Better Foreman Question
What collar size and is it sealed to seal class?
Verify With
Reference type: SMACNA
Source to verify: Drawings; seal class
Safe wording: Seal per class.