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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24 x 12 in. Return Air Box Plenum for Grille
$72.99This 24 x 12 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 24 x 12 in.For a ceiling or floor return installationPair with a suitable start collar and return...$72.99 -
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12 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal
$14.99Add a 12 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.Nominal duct size: 12 in.Tabbed mounting edgeSnap-together constructionConfirm opening size and the...$14.99 -
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6 in. Adjustable 90 Round Sheet Metal Duct Elbow
$18.99Turn a 6 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 6 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$18.99 -
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10 x 10 x 6 in. Ceiling Register Box, 6 in. Round Duct Connection
$31.99Connect a 10 x 10 in. register opening to 6 in. round HVAC supply duct with this ceiling register box.Register opening: 10 x 10 in.Round duct connection: 6 in.Sheet metal register bootMeasure the...$31.99 -
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12 x 12 x 10 in. Side-Outlet Ceiling Register Box, 10 in. Round Duct Connection
$83.99Connect a 12 x 12 in. register opening to 10 in. round HVAC supply duct with this side-outlet ceiling register box.Register opening: 12 x 12 in.Round duct connection: 10 in.Side outletMeasure the...$83.99 -
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20 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$79.99Connect a 20 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 20 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$79.99 -
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12 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$36.99Connect a 12 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 12 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$36.99 -
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10 x 10 x 9 in. Ceiling Register Box, 9 in. Round Duct Connection
$31.99Connect a 10 x 10 in. register opening to 9 in. round HVAC supply duct with this ceiling register box.Register opening: 10 x 10 in.Round duct connection: 9 in.Sheet metal register bootMeasure the...$31.99 -
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16 in. Round Sheet Metal Duct End Cap
$41.99Close the end of an unused 16 in. round duct run with this sheet metal end cap.Nominal duct size: 16 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct...$41.99 -
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16 x 16 x 12 in. Galvanized Duct T-Wye, 45° Branch
$154.00This 16 x 16 x 12 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 16 in. x 16 in. x 12 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$154.00 -
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20 x 14 in. Round Sheet Metal Duct Reducer
$71.99Connect two different round duct sizes with this 20 x 14 in. sheet metal reducer.Nominal connection sizes: 20 in. and 14 in.For transitioning between compatible round HVAC ductsConfirm both...$71.99 -
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25 x 14 in. Return Air Box Plenum for Grille
$74.99This 25 x 14 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 25 x 14 in.For a ceiling or floor return installationPair with a suitable start collar and return...$74.99