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.
For technical drawings and 3-D models, click on a part number.
Galvanized Steel | Aluminum | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Includes | End Construction | Gauge | Each | Gauge | Each | ||
Exhaust Vent | ||||||||||
| 3 | 3" | __ | Damper | Plain | __ | 000000 | 00 | 24 | 0000000 | 000000 |
| 4 | 4" | __ | Damper | Plain | 30 | 00000000 | 000000 | 24 | 0000000 | 00000 |
| 5 | 5" | __ | Damper | Plain | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 6 | 6" | __ | Damper | Plain | 30 | 00000000 | 00000 | 24 | 0000000 | 00000 |
| 7 | 7" | __ | Damper | Plain | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 8 | 8" | __ | Damper | Plain | 30 | 00000000 | 00000 | 24 | 0000000 | 000000 |
Intake Vent | ||||||||||
| 4 | __ | 3 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 5 | __ | 4 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 6 | __ | 5 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 7 | __ | 6 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 8 | __ | 7 7/8" | Screen | Crimped | 30 | 00000000 | 00000 | __ | 000000 | 00 |
Galvanized Steel | 304 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | End Construction | Gauge | Each | Gauge | Each | ||
| 3 | 3" | Plain | 26 | 0000000 | 000000 | __ | 000000 | 00 |
| 4 | 4" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 000000 |
| 5 | 5" | Plain | 26 | 0000000 | 00000 | __ | 000000 | 00 |
| 6 | 6" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 00000 |
| 7 | 7" | Plain | 26 | 0000000 | 00000 | __ | 000000 | 00 |
| 8 | 8" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 00000 |
| 9 | 9" | Plain | 26 | 0000000 | 00000 | __ | 000000 | 00 |
| 10 | 10" | Plain | 26 | 0000000 | 00000 | 26 | 0000000 | 000000 |
| 12 | 12" | Plain | 26 | 0000000 | 00000 | 26 | 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.
For technical drawings and 3-D models, click on a part number.
Sloped Roof Vent Caps
Cover external vents to reduce downdrafts and prevent obstructions from entering the vent.
For Duct | Painted Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Dia. | Ht. | Wd. | Lg. | Gauge | Features | Includes | Each | |
For Rectangular and Round Duct | ||||||||||
| 10" | 3 1/4" | 8" | 6 5/8" | 14 1/4" | 18 3/4" | 24 | Bird Screen | Backdraft Damper | 0000000 | 000000 |
Wall Vent Caps
Cover external vents to reduce downdrafts and prevent obstructions from entering the vent.
For Duct | Mounting | Painted Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Ht. | Wd. | Lg. | Gauge | Features | Includes | Fasteners Included | Hole Dia. | Each | |
For Rectangular Duct | |||||||||||
| 10" | 3 1/4" | 5 5/8" | 12 3/4" | 8 7/8" | 24 | Bird Screen | Backdraft Damper | No | 3/16" | 0000000 | 000000 |
Chimney Vent Caps
Cover chimneys to reduce downdrafts and prevent obstructions from entering.
For technical drawings and 3-D models, click on a part number.
Aluminum | |||||||
|---|---|---|---|---|---|---|---|
| For Duct Dia. | Ht. | Dia. | Gauge | Connection Type | Specifications Met | Each | |
For Round Duct | |||||||
| 2 7/8"-4 7/8" | 4 1/2" | 6 5/8" | 22 | Press Fit | UL Listed | 0000000 | 000000 |
| 4 7/8"-6 7/8" | 4 3/4" | 9 1/2" | 22 | Press Fit | UL Listed | 0000000 | 00000 |
| 6 7/8"-8 7/8" | 5 7/8" | 11 5/8" | 22 | Press Fit | UL Listed | 0000000 | 000000 |
| 8 7/8"-10 7/8" | 6 1/2" | 12 3/4" | 22 | Press Fit | UL Listed | 0000000 | 000000 |
Spark-Protection Chimney Vent Caps
The expanded mesh on these vent caps provides spark protection. They cover chimneys to reduce downdrafts and prevent obstructions from entering.
304 stainless steel caps are corrosion resistant.
For technical drawings and 3-D models, click on a part number.
For Duct | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Ht. | Wd. | Lg. | Gauge | Connection Type | Color | Each | |
For Rectangular Duct | |||||||||
| 11 1/2"-13 1/2" | 7 1/2"-9 1/2" | 8" | 13 1/2" | 7 1/2" | 22 | Press Fit | Black | 0000000 | 000000 |
For Square Duct | |||||||||
| 7 1/2"-9 1/2" | 7 1/2"-9 1/2" | 8" | 9 1/2" | 7 1/2" | 22 | Press Fit | Black | 0000000 | 00000 |
| 11 1/2"-13 1/2" | 11 1/2"-13 1/2" | 8" | 13 1/2" | 11 1/2" | 22 | Press Fit | Black | 0000000 | 00000 |
For Duct | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Ht. | Wd. | Lg. | Gauge | Connection Type | Each | |
For Square Duct | ||||||||
| 11 1/2"-13 1/2" | 11 1/2"-13 1/2" | 8" | 13 1/2" | 11 1/2" | 22 | Press Fit | 0000000 | 0000000 |
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.
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.
Exhaust Pipe Caps
Keep rain and debris out of vertical exhaust pipe with these caps that open with slight pressure from exhaust. They are often used on generators and other large outdoor equipment.
For technical drawings and 3-D models, click on a part number.
Powder-Coated Steel | |||||||
|---|---|---|---|---|---|---|---|
| For Duct Dia. | Ht. | Lg. | Gauge | Connection Type | Color | Each | |
| 1"-1 3/16" | 3" | 4 5/16" | 16 | Slide On | Gray | 0000000 | 000000 |
| 1 1/4"-1 7/16" | 3" | 4 5/8" | 16 | Slide On | Gray | 0000000 | 00000 |
| 1 1/2"-1 11/16" | 3" | 4 7/8" | 16 | Slide On | Gray | 0000000 | 00000 |
| 1 3/4"-1 15/16" | 3 1/4" | 5 3/16" | 16 | Slide On | Gray | 0000000 | 00000 |
| 2"-2 3/16" | 3 1/4" | 6 3/8" | 16 | Slide On | Gray | 0000000 | 00000 |