Spiral & Round · Size, Pressure & Special Routing
Very small 4–6 inch round branch
Round metal — Small terminal branch
ConnectionSlip-fit
SupportBand/strap
How to install it
- 1
Use correctly sized fittings
- 2
avoid excessive screws
- 3
support with small band/strap
- 4
keep bends gentle
- 5
seal joints
- 6
protect from crushing above ceiling.
Quality check
- Full diameter maintained
- no sharp screw intrusion
- no sag
Stop and verify
Stop if branch is being flattened to fit