Metal Duct Fittings
Shop galvanized metal HVAC duct fittings and round duct pipe for residential and light-commercial heating, air-conditioning, ventilation and evaporative-cooling systems. Available products include snap-lock pipe, adjustable elbows, reducers, start collars, T-wye fittings, saddle taps, dampers, end caps, register boxes, return-air boxes and flexible-duct connectors.
Use metal duct fittings to build straight runs, change direction, transition between duct sizes, create branch lines and connect ductwork to registers, grilles and HVAC equipment. Many fittings are designed for use with round galvanized pipe or insulated flexible duct.
Before ordering, confirm the duct diameter, fitting dimensions, crimped or non-crimped connection orientation and the intended airflow direction. Sheet-metal products may have sharp edges; wear appropriate gloves during handling and installation. Seal and mechanically secure duct connections according to applicable installation requirements.
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3-Foot Snap-Lock Duct Pipe
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45 Degree Duct Saddle Taps
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5-Foot Snap-Lock Duct Pipe
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Adjustable 90° Duct Elbows
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Ceiling Register Boxes
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Disc Dampers with Hardware
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Duct Reducers
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Evaporative Cooler Ductwork
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Flexible Duct Connectors
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Return Air Boxes
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Roof Pipe Flashings
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Round Duct End Caps
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Side-Outlet Ceiling Register Boxes
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Start Collars
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T-Wye Duct Fittings
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Wall & Floor Register Boxes
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12 in. Sheet Metal Roof Pipe Flashing for Round Duct
$109.99Fit a 12 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 12 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$109.99Qty in Cart: 0Quantity:Price:$109.99Subtotal: -
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18 x 16 x 14 in. Sheet Metal Duct T-Wye, 45° Branch
$197.00This 18 x 16 x 14 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 18 in. x 16 in. x 14 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$197.00 -
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20 in. Round Sheet Metal Duct End Cap
$62.99Close the end of an unused 20 in. round duct run with this sheet metal end cap.Nominal duct size: 20 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct...$62.99 -
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24 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$99.99Connect a 24 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 24 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$99.99Qty in Cart: 0Quantity:Price:$99.99Subtotal: -
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4 in. x 10 ft. Aluminum Flexible Dryer Exhaust Duct
$53.99Route dryer or fan exhaust with this 4 in. diameter flexible aluminum duct, 10 ft. long when uncompressed.Nominal diameter: 4 in.Uncompressed length: 10 ft.Flexible aluminum duct for dryer or fan...$53.99 -
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5 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$39.99Build a straight round duct run with this 5 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 5 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$39.99 -
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5 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$104.99Build a straight round duct run with this 5 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 5 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$104.99 -
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6 x 4 x 4 in. Galvanized Duct T-Wye, 45° Branch
$36.00This 6 x 4 x 4 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 6 in. x 4 in. x 4 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$36.00 -
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7 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$51.99Build a straight round duct run with this 7 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 7 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$51.99 -
8 in. Sheet Metal Roof Pipe Flashing for Round Duct
$78.99Fit a 8 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 8 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$78.99Qty in Cart: 0Quantity:Price:$78.99Subtotal: -
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9 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal
$12.99Add a 9 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.Nominal duct size: 9 in.Tabbed mounting edgeSnap-together constructionConfirm opening size and the...$12.99 -
20 in. Sheet Metal Roof Pipe Flashing for Round Duct
$211.99Fit a 20 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 20 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$211.99Qty in Cart: 0Quantity:Price:$211.99Subtotal: