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.
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 | 30 | 0000000 | 000000 |
| 4 | 4" | __ | Damper | Plain | 30 | 00000000 | 000000 | 30 | 0000000 | 00000 |
| 5 | 5" | __ | Damper | Plain | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 6 | 6" | __ | Damper | Plain | 30 | 00000000 | 00000 | 22 | 0000000 | 00000 |
| 7 | 7" | __ | Damper | Plain | 30 | 00000000 | 00000 | __ | 000000 | 00 |
| 8 | 8" | __ | Damper | Plain | 30 | 00000000 | 00000 | 22 | 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 |
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 |
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 |
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.
For technical drawings and 3-D models, click on a part number.
For Duct | Painted Steel | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 |
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 |