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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4 in. Adjustable 90 Round Sheet Metal Duct Elbow
$12.99Turn a 4 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 4 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$12.99 -
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10 x 6 x 6 in. Galvanized Duct T-Wye, 45° Branch
$68.00This 10 x 6 x 6 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 10 in. x 6 in. x 6 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$68.00 -
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14 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$54.99Connect a 14 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 14 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$54.99 -
18 in. Evaporative Cooler Duct Connect Apron
$18.59Connect a rooftop evaporative cooler opening to a compatible duct system with this 18 in. duct apron.Nominal size in product title: 18 in.Use with a compatible start collar as requiredConfirm the...$18.59Qty in Cart: 0Quantity:Price:$18.59Subtotal: -
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10 x 10 x 7 in. Ceiling Register Box, 7 in. Round Duct Connection
$31.99Connect a 10 x 10 in. register opening to 7 in. round HVAC supply duct with this ceiling register box.Register opening: 10 x 10 in.Round duct connection: 7 in.Sheet metal register bootMeasure the...$31.99 -
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12 x 10 in. Round Sheet Metal Duct Reducer
$31.99Connect two different round duct sizes with this 12 x 10 in. sheet metal reducer.Nominal connection sizes: 12 in. and 10 in.For transitioning between compatible round HVAC ductsConfirm both...$31.99 -
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8 x 7 in. Round Sheet Metal Duct Reducer
$26.99Connect two different round duct sizes with this 8 x 7 in. sheet metal reducer.Nominal connection sizes: 8 in. and 7 in.For transitioning between compatible round HVAC ductsConfirm both connection...$26.99 -
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12 x 8 in. Round Sheet Metal Duct Reducer
$31.99Connect two different round duct sizes with this 12 x 8 in. sheet metal reducer.Nominal connection sizes: 12 in. and 8 in.For transitioning between compatible round HVAC ductsConfirm both connection...$31.99 -
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6 x 6 x 6 in. Galvanized Duct T-Wye, 45° Branch
$36.00This 6 x 6 x 6 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 6 in. x 6 in. x 6 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$36.00 -
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20 in. Round Duct Disc Damper with Hardware
$28.99Control airflow in a 20 in. round metal supply duct with this disc damper and hardware.Nominal duct diameter: 20 in.Disc sets the opening angle inside the ductHardware included as listedVerify duct...$28.99 -
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5 in. Round Duct Disc Damper with Hardware
$15.99Control airflow in a 5 in. round metal supply duct with this disc damper and hardware.Nominal duct diameter: 5 in.Disc sets the opening angle inside the ductHardware included as listedVerify duct...$15.99 -
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9 in. Adjustable 90 Round Sheet Metal Duct Elbow
$27.99Turn a 9 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 9 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$27.99