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.
For technical drawings and 3-D models, click on a part number.
Adjustable-angle elbow connectors can be used at an angle or straight.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 9 | 9" | 8 7/8" | 26 | Crimped | 0000000 | 000000 |
Adjustable-angle elbow connectors can be used at an angle or straight.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 9 | 9" | 8 7/8" | 26 | Crimped | 00000000 | 000000 |
Tee connectors join or split runs of duct.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
Female × Female × Male | ||||||
| 9 | 9" | 8 7/8" | 26 | Crimped | 00000000 | 000000 |
Reducers connect duct with different diameters.
Duct Size | Galvanized Steel | ||||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | Female ID (A) | Male OD (B) | End Construction | Gauge | Each | |
| 9 | 8 | 9" | 7 15/16" | Crimped | 26 | 0000000 | 000000 |
Airflow dampers control airflow through duct.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | End Construction | Blade Material | Each | |
Standard | ||||||
| 9 | 8 3/4" | 20 | Plain | Galvanized Steel | 00000000 | 0000000 |
Add damper blades to duct to control airflow.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Female ID | Gauge | Includes | Each | |
| 9 | 9" | 26 | Handle | 0000000 | 00000 |
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Female ID | End Construction | Gauge | Each | |
| 9 | 9" | Plain | 26 | 0000000 | 000000 |
Quick-Disconnect Duct and Fittings
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
Galvanized steel has good corrosion resistance. Aluminum is lightweight and has good corrosion resistance. 304 stainless steel is the most corrosion resistant.
For technical drawings and 3-D models, click on a part number.
Adjustment sleeves extend your duct length. Cut duct, then slide on the sleeve. They include an O-ring for the clamp to grasp.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | ID | End Construction | Style | Gauge | Each | |
| 9 | 8 7/8" | Rolled | B | 22 | 00000000 | 0000000 |
Adapters join quick-disconnect duct to other duct systems. Duct-to-duct adapters connect to standard and spiral duct. Duct-to-duct with flange adapters provide a secure connection between duct. Duct flanges are also available. Duct-to-hose adapters are slightly undersized. Slide hose over the adapter and hold it in place with a hose clamp (not included).
Ball joints create adjustable-angle connections.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | ID | Gauge | End Construction | Each | |
| 9 | 8 7/8" | 18 | Rolled | 00000000 | 0000000 |
Flow sights have a clear plastic section, so you can easily view material flow through your duct.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Window Material | Gauge | End Construction | Each | |
| 9 | Acrylic Plastic | 22 | Rolled | 00000000 | 0000000 |
Spark traps lower fire risk by reducing the number of sparks in a duct system.
Powder-Coated Steel | ||||
|---|---|---|---|---|
| Duct Size | Gauge | End Construction | Each | |
| 9 | 22 | Rolled | 00000000 | 000000000 |
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.
Galvanized steel has good corrosion resistance. PVC-coated steel combines the strength of steel with the corrosion resistance of plastic. 304 stainless steel is more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Add a noise reducer to duct to decrease noise by as much as 50%.
Male straight connectors are required to connect two pieces of duct.
Female straight connectors join two fittings.
Reducers connect duct with different diameters.
Collars create branches from a rectangular duct. Cut a hole in the duct and use a collar to attach spiral duct.
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.
Steel, galvanized steel, 304 stainless steel, and aluminum flanges are also known as angle rings.
Galvanized steel flanges have good corrosion resistance. Aluminum flanges have good corrosion resistance in wet environments, and weigh less than steel and stainless steel flanges. 304 stainless steel flanges are more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Flange | Mounting | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Fasteners Included | No. of Holes | Hole Dia. | Connection Type | Each | |
Steel | ||||||||||
| 9 | 9 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 000000 |
Galvanized Steel | ||||||||||
| 9 | 9 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
304 Stainless Steel | ||||||||||
| 9 | 9 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
Alumiunum | ||||||||||
| 9 | 9 1/8" | 1 1/4" | 1 1/4" | 1/8" | No | 6 | 3/8" | Press Fit | 0000000 | 00000 |
Weld-On Duct Flanges
Weld 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. Also known as angle rings.
304 stainless steel flanges are more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Blast Gates
Stainless Steel
Gate Material
Control the flow of air and material through duct systems.
Aluminum is more lightweight than stainless steel and has good corrosion resistance.316 stainless steel has excellent corrosion resistance.
On gates with a locking screw, use the screw to hold the slide in position.
For technical drawings and 3-D models, click on a part number.
Overall | ||||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Wd. | Ht. | Dp. | Features | Connection Type | Each | |
Galvanized Steel Slide | ||||||||
| 9 | 8 7/8" | 10 5/8" | 20 3/8" | 3 3/16" | Locking Screw | Press Fit | 0000000 | 0000000 |
Overall | ||||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Wd. | Ht. | Dp. | Features | Connection Type | Each | |
316 Stainless Steel Slide | ||||||||
| 9 | 8 7/8" | 11" | 23 5/8" | 4 1/4" | Locking Screw | Press Fit | 0000000 | 0000000 |
Easy-Install Blast Gates
Often added to existing systems, these gates install without disassembling duct. Also known as half gates, these blast gates control the flow of air and material through duct systems. The locking screw holds the gate’s slide in position.
304 stainless steel is more corrosion resistant than galvanized steel.
For technical drawings and 3-D models, click on a part number.
Furnace Draft Dampers
Also known as barometric dampers, these dampers improve furnace performance by automatically opening and closing to maintain a consistent airflow despite changing environmental conditions.
Single-acting dampers open inward to prevent strong drafts from pulling too much heat into the chimney vent.
Double-acting dampers open both inward and outward to relieve pressure caused by obstructions and downdrafts.