About Duct Connections
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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.
PVC-coated steel combines the strength of steel with the corrosion resistance of plastic.
For technical drawings and 3-D models, click on a part number.
Male straight connectors are required to connect two pieces of duct.
Reducers connect duct with different diameters.
Duct Size | Male OD | PVC-Coated Steel | |||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | End Construction | Gauge | Each | |
| 5 | 4 | 4 7/8" | 3 7/8" | Plain | 20 | 00000000 | 000000 |
| 6 | 4 | 5 7/8" | 3 7/8" | Plain | 20 | 00000000 | 00000 |
| 6 | 5 | 5 7/8" | 4 7/8" | Plain | 20 | 00000000 | 00000 |
| 7 | 6 | 6 7/8" | 5 7/8" | Plain | 20 | 00000000 | 00000 |
| 8 | 6 | 7 7/8" | 5 7/8" | Plain | 20 | 00000000 | 00000 |
| 8 | 7 | 7 7/8" | 6 7/8" | Plain | 20 | 00000000 | 00000 |
| 9 | 8 | 8 7/8" | 7 7/8" | Plain | 20 | 00000000 | 00000 |
| 10 | 8 | 9 7/8" | 7 7/8" | Plain | 20 | 00000000 | 000000 |
| 10 | 9 | 9 7/8" | 8 7/8" | Plain | 20 | 00000000 | 000000 |
| 12 | 10 | 11 7/8" | 9 7/8" | Plain | 20 | 00000000 | 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.
For technical drawings and 3-D models, click on a part number.
Reducers connect duct with different diameters.
Duct Flanges
Bolt flanges to equipment to start a run of duct. They can also create secure connections between two duct ends by mounting a flange to each end and then joining the flanges.
PVC plastic flanges are chemical resistant and withstand harsh environments. They’re compatible with Chemical-Resistant Duct and Fittings.
For technical drawings and 3-D models, click on a part number.
Flange | Mounting | PVC Plastic | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Fasteners Included | No. of Holes | Hole Dia. | Connection Type | Each | |
| 4 | 4 1/2" | 2 1/4" | 1 7/8" | 1/4" | No | 4 | 5/16" | Press Fit | 000000 | 000000 |
| 6 | 6 5/8" | 3 1/4" | 1 1/2" | 1/4" | No | 8 | 5/16" | Press Fit | 0000000 | 00000 |
| 8 | 8 5/8" | 3 1/4" | 1 1/2" | 1/4" | No | 10 | 5/16" | Press Fit | 0000000 | 00000 |
| 10 | 10 3/4" | 3 1/4" | 1 3/8" | 1/4" | No | 12 | 5/16" | Press Fit | 0000000 | 000000 |
| 12 | 12 3/4" | 3 1/2" | 1 3/8" | 1/4" | No | 16 | 5/16" | Press Fit | 0000000 | 000000 |
| 14 | 14" | 3 1/2" | 1 3/4" | 1/4" | No | 16 | 5/16" | Press Fit | 0000000 | 000000 |
| 16 | 16" | 3 1/2" | 1 3/4" | 1/4" | No | 18 | 5/16" | Press Fit | 0000000 | 000000 |