A spiral elbow collar is too short and slips apart

If the collar engagement is too short to hold, do not trust the joint. Replace the fitting or add an approved coupling/detail with proper overlap.

Round, Spiral & Oval Duct 2nd Year YELLOW

Watch out

Do not use sealant to compensate for almost no mechanical collar engagement.

Check

Check actual pipe overlap on the collar.
Look for joints slipping, rattling, or pulling apart.
Verify pipe end is square and fully seated.
Use approved fitting/coupler with proper engagement.
Fasten and seal only after the mechanical overlap is right.

Steps

Check actual pipe overlap on the collar.
Look for joints slipping, rattling, or pulling apart.
Verify pipe end is square and fully seated.
Use approved fitting/coupler with proper engagement.
Fasten and seal only after the mechanical overlap is right.

Say this to your foreman

The spiral elbow at [location] has a short collar and the pipe is barely engaged. I stopped sealing it. Do you want the fitting swapped or an approved coupling used for proper overlap?