About Duct Connections
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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.
Reducers connect duct with different diameters.
Duct Size | Male OD | Galvanized Steel | |||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Gauge | Gasket Material | Each | |
| 6 | 4 | 5 7/8" | 3 7/8" | 20 | EPDM Rubber | 0000000 | 000000 |
| 8 | 6 | 7 7/8" | 5 7/8" | 20 | EPDM Rubber | 0000000 | 00000 |
| 10 | 6 | 9 7/8" | 5 7/8" | 20 | EPDM Rubber | 0000000 | 00000 |
| 10 | 8 | 9 7/8" | 7 7/8" | 20 | EPDM Rubber | 0000000 | 00000 |
| 12 | 10 | 11 7/8" | 9 7/8" | 20 | EPDM Rubber | 0000000 | 00000 |
| 12 | 8 | 11 7/8" | 7 7/8" | 20 | EPDM Rubber | 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.
Adjustment sleeves extend your duct length. Cut duct, then slide on the sleeve. They include an O-ring for the clamp to grasp.
Adjustment Sleeves | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Galvanized Steel | 304 Stainless Steel | Replacement O-Rings | ||||||||
| Duct Size | ID | Gauge | Max. Sleeve Extension | End Construction | Each | Each | Each | |||
| 3 | 3 1/8" | 22 | 7" | Rolled | 00000000 | 000000 | 00000000 | 000000 | 00000000 | 00000 |
| 4 | 3 15/16" | 22 | 7" | Rolled | 0000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 5 | 4 15/16" | 22 | 7" | Rolled | 0000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 6 | 6" | 22 | 7" | Rolled | 0000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 7 | 7" | 22 | 7" | Rolled | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 8 | 8" | 22 | 7" | Rolled | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 9 | 9" | 22 | 7" | Rolled | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 10 | 10" | 22 | 7" | Rolled | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 0000 |
| 12 | 12 1/8" | 22 | 7" | Rolled | 00000000 | 00000 | 00000000 | 000000 | 00000000 | 0000 |
| 14 | 14 1/8" | 20 | 7" | Rolled | 00000000 | 00000 | 00000000 | 000000 | 00000000 | 00000 |
| 16 | 16 1/8" | 20 | 7" | Rolled | 00000000 | 00000 | 00000000 | 000000 | 00000000 | 00000 |
| 18 | 18" | 20 | 7" | Rolled | 00000000 | 00000 | 000000 | 00 | 00000000 | 00000 |
| 18 | 18 1/16" | 20 | 7" | Rolled | 00000000 | 00000 | 000000 | 00 | 00000000 | 00000 |
| 20 | 20" | 20 | 7" | Rolled | 00000000 | 00000 | 000000 | 00 | 00000000 | 00000 |
| 20 | 20 1/16" | 20 | 7" | Rolled | 000000 | 00 | 00000000 | 000000 | 00000000 | 00000 |
| 22 | 22" | 20 | 7" | Rolled | 00000000 | 00000 | 000000 | 00 | 00000000 | 00000 |
| 24 | 24" | 20 | 7" | Rolled | 00000000 | 000000 | 000000 | 00 | 00000000 | 00000 |
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.
Airflow dampers control airflow through duct. Gasketed dampers are airtight.
Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | Gasket Material | End Construction | Blade Material | Each | |
Gasketed | |||||||
| 4 | 3 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 0000000 |
| 6 | 5 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
| 8 | 7 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
| 10 | 9 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
| 12 | 11 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
Collars create branches from a rectangular duct. Cut a hole in the duct and use a collar to attach standard duct. Collar with polyethylene gasket is self-sealing because the gasket has an adhesive back. The flange has 1/8" dia. mounting holes.
Galvanized Steel with Polyethylene Foam Gasket | |||||
|---|---|---|---|---|---|
| Duct Size | Male OD | End Construction | Gauge | Each | |
Male | |||||
| 5 | 4 7/8" | Crimped | 24 | 0000000 | 000000 |
| 6 | 5 7/8" | Crimped | 24 | 0000000 | 00000 |
| 7 | 6 7/8" | Crimped | 24 | 0000000 | 00000 |
| 8 | 7 7/8" | Crimped | 24 | 0000000 | 00000 |
| 10 | 9 7/8" | Crimped | 24 | 0000000 | 00000 |
| 12 | 11 7/8" | Crimped | 24 | 0000000 | 00000 |
| 14 | 13 7/8" | Crimped | 24 | 0000000 | 00000 |
| 16 | 15 7/8" | Crimped | 24 | 0000000 | 00000 |
| 18 | 17 7/8" | Crimped | 24 | 0000000 | 00000 |