Flex duct kinks at a register boot and needs a 45-degree hard fitting
Flex does not like sharp unsupported direction changes. Add a rigid angled boot/elbow where needed, then connect the flex so the core stays round and open.
Do not force flex through a sharp bend right off a boot collar and bury the airflow restriction.
Check
Look for the flex core flattened at the boot.
Check boot collar direction versus branch path.
Use a rigid elbow/angled fitting if the turn is too sharp.
Support the flex so it does not sag back into the kink.
Seal and strap the inner liner properly before the outer jacket.
Steps
Look for the flex core flattened at the boot.
Check boot collar direction versus branch path.
Use a rigid elbow/angled fitting if the turn is too sharp.
Support the flex so it does not sag back into the kink.
Seal and strap the inner liner properly before the outer jacket.
Say this to your foreman
The flex at [location] is kinked right off the register boot. I think it needs a rigid 45/angled boot first so the flex stays open. Do you want me to change that connection?