About Duct Connections
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Standard Duct and Fittings
No need for clamps or connectors—duct and fittings press-fit together. Male ends are crimped or tapered, making them slightly smaller than a female end for simple assembly.
Galvanized steel has good corrosion resistance. Aluminum is more lightweight than steel and stainless steel and has good corrosion resistance. 304 stainless steel is more corrosion resistant than steel and aluminum.
Airflow dampers control airflow through duct.
Aluminum | |||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Blade Material | Each | |
Standard | |||||||
| 4 | 4" | 3 7/8" | 26 | Crimped | Aluminum | 0000000 | 000000 |
Add damper blades to duct to control airflow.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Female ID | Gauge | Includes | Each | |
| 4 | 4" | 28 | Handle | 0000000 | 00000 |
Quick-Disconnect Duct and Fittings
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
Galvanized steel has good corrosion resistance. 304 stainless steel is the most corrosion resistant.
Crush-Resistant Spiral Duct and Fittings
A spiral seam makes this duct strong and rigid. Fittings have male ends with a slightly smaller diameter to press-fit into duct.
Galvanized steel has good corrosion resistance. 304 stainless steel is more corrosion resistant than steel.
Sure-Seal Spiral Duct and Fittings
Fittings have gaskets which create a tight seal—you don't need to seal joints with coating or tape. Fittings have male ends with a slightly smaller diameter to press-fit into duct. These duct and fittings are compatible with Crush-Resistant Spiral Duct and Fittings.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | Gasket Material | Each | |
| 4 | 3 7/8" | 24 | EPDM Rubber | 0000000 | 000000 |
Chemical-Resistant Duct and Fittings
Made of PVC plastic to withstand acids, alkalies, salts, and other corrosive vapors and fumes. Use PVC pipe cement (not included) to secure components. Fittings have female ends with a slightly larger diameter to press-fit over duct.
Fire-Rated Airflow Dampers
In the event of a fire, these dampers automatically stop airflow through duct. They have a fusible link that melts at 165° F, releasing a spring and causing the blades to close. Dampers meet UL 555 fire safety standards to help prevent the spread of fire for 1 ½ hours. They are undersized to fit inside duct.
