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About Duct Connections
More
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.
304 stainless steel is more corrosion resistant than steel and aluminum.
For technical drawings and 3-D models, click on a part number.

Tee connectors join or split runs of duct.
304 Stainless Steel | ||||||
---|---|---|---|---|---|---|
Trade Size | Female ID | Male OD | Gauge | End Construction | Each | |
Female × Female × Male | ||||||
4 | 4" | 3 7/8" | 26 | Crimped | 00000000 | 0000000 |
6 | 6" | 5 7/8" | 26 | Crimped | 0000000 | 00000 |
8 | 8" | 7 7/8" | 26 | Crimped | 0000000 | 000000 |
14 | 14" | 13 7/8" | 26 | Crimped | 00000000 | 000000 |
16 | 16" | 15 7/8" | 26 | Crimped | 00000000 | 000000 |
18 | 18" | 17 7/8" | 26 | Crimped | 00000000 | 000000 |
20 | 20" | 19 7/8" | 26 | Crimped | 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.
Gas Chimney Vents and Fittings
For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.
To join pipes and connectors, insert a male end into a female end and secure with the included locking band.
For technical drawings and 3-D models, click on a part number.

Galvanized Steel | ||||||||
---|---|---|---|---|---|---|---|---|
Trade Size | Female ID | Male OD | Gauge | Construction | Inner Wall Material | Specifications Met | Each | |
Female × Female × Male | ||||||||
4 | 4" | 4 1/2" | 28 | Double Wall | Aluminum | UL Listed | 0000000 | 000000 |
5 | 5" | 5 1/2" | 28 | Double Wall | Aluminum | UL Listed | 0000000 | 00000 |
6 | 6" | 6 1/2" | 28 | Double Wall | Aluminum | UL Listed | 0000000 | 00000 |
7 | 7" | 8" | 28 | Double Wall | Aluminum | UL Listed | 0000000 | 000000 |
8 | 8" | 9" | 28 | Double Wall | Aluminum | UL Listed | 0000000 | 000000 |
High-Temperature Chimney Vents and Fittings
Built to withstand temperatures up to 1000° F, these vent pipes and fittings are for use with boilers, furnaces, stoves, and other equipment that is fired by gas, oil, wood, or coal.
To join pipes and connectors, twist a male end into a female end and secure with the included locking band.

304 Stainless Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
Trade Size | Female ID | Male OD | Gauge | Construction | Insulation Thick. | Includes | Specifications Met | Each | |
Female × Female × Male | |||||||||
6 | 6" | 8" | 28 | Double Wall | 1" | Locking Band, Removable Cap | UL Listed | 0000000 | 0000000 |
8 | 8" | 10" | 28 | Double Wall | 1" | Locking Band, Removable Cap | UL Listed | 0000000 | 000000 |
10 | 10" | 12" | 28 | Double Wall | 1" | Locking Band, Removable Cap | UL Listed | 0000000 | 000000 |
12 | 12" | 14" | 28 | Double Wall | 1" | Locking Band, Removable Cap | UL Listed | 0000000 | 000000 |