About Duct Connections
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Crush-Resistant Spiral Duct and Fittings
![](/prerenderstable/mvPRE/contents/gfx/imagecache/h01/h01a-spiral-duct-connection-gil1548180353@halfx_635503701760000000.png?ver=imagenotfound)
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.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/507/5078k59p1--388ede2a1fb1564412464-p9@halfx_636999912887595254.png?ver=imagenotfound)
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
![](/prerenderstable/mvPRE/contents/gfx/imagecache/205/2051k889-1634673510-p9@halfx_637702523318112159.png?ver=imagenotfound)
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.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/205/2051k21c1--73672258b2c1564083841-p9@halfx_636996626634781642.png?ver=imagenotfound)
Reducers connect duct with different diameters.