Duct Reducers & Increasers

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Everbilt 3 in. to 4 in. Plastic Duct to Duct Increaser
Item # 3571128

The Duct to Duct Increaser connects 3 in. to 4 in. ducts together. It is ideal for bathroom fan exhaust applications. Finished in black color. The increaser is designed to be a tight fit to reduce air leaks in the connections. When using the increaser with a 3 in or 4 in snap pipe (aluminum or galvanized) , it may be necessary to unsnap the receiving end of the pipe, then insert the increaser and snap the pipe back together.

  • Made of polypropylene
  • Used when your exhaust port or exhaust hood needs to be increased from 3 in. to accommodate a 4 in. duct
  • Consult your local building codes for approved installation practices
  • Light weight design
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Master Flow 8 in. to 6 in. Round Reducer
Master Flow 8 in. to 6 in. Round Reducer
Item # 3570317

The Master Flow 8 in. x 6 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 8 in. pipe to a 6 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 8 in. pipe to 6 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
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Master Flow 4 in. to 3 in. Round Reducer
Master Flow 4 in. to 3 in. Round Reducer
Item # 3570311

The Master Flow 4 in. x 3 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 4 in. pipe to a 3 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 4 in. pipe to 3 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
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Qty:

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Master Flow 5 in. to 4 in. Round Reducer
Master Flow 5 in. to 4 in. Round Reducer
Item # 3570312

The Master Flow 5 in. x 4 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 5 in. pipe to a 4 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 5 in. pipe to 4 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
  • Maximum temperature rating of 390F, minimum temperature rating of -100F
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Master Flow 6 in. to 4 in. Round Reducer
Master Flow 6 in. to 4 in. Round Reducer
Item # 3570313

The Master Flow 6 in. x 4 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 6 in. pipe to a 4 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 6 in. pipe to 4 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
Units: Each
Qty:

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Master Flow 6 in. to 5 in. Round Reducer
Master Flow 6 in. to 5 in. Round Reducer
Item # 3570314

The Master Flow 6 in. x 5 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 6 in. pipe to a 5 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 6 in. pipe to 5 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
Units: Each
Qty:

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Master Flow 4 in. to 3 in. 26-Gauge Round Reducer
Master Flow 4 in. to 3 in. 26-Gauge Round Reducer
Item # 3570321

The Master Flow 4 in. x 3 in. Round Reducer is made of 26-Gauge, galvanized steel. It is used to transition from a 4 in. pipe to a 3 in. pipe in an HVAC system. It features hemmed collar edges for strength and a snug fit. This round reducer is suitable for most HVAC applications.

  • Made of 26-Gauge, galvanized steel
  • Used to transition from a 4 in. pipe to a 3 in. pipe in an HVAC system
  • Always seal seams with building code-approved sealant or duct tape (not included)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
  • Hemmed collar edges for a snug fit and increased strength
Units: Each
Qty:

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Master Flow 7 in. to 6 in. Round Reducer
Master Flow 7 in. to 6 in. Round Reducer
Item # 3570316

The Master Flow 7 in. x 6 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 7 in. pipe to a 6 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 7 in. pipe to 6 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
Units: Each
Qty:

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Master Flow 12 in. to 10 in. Round Reducer
Master Flow 12 in. to 10 in. Round Reducer
Item # 3570320

The Master Flow 12 in. x 10 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 12 in. pipe to a 10 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 12 in. pipe to 10 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
Units: Each
Qty:

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Master Flow 10 in. to 8 in. Round Reducer
Master Flow 10 in. to 8 in. Round Reducer
Item # 3570319

The Master Flow 10 in. x 8 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 10 in. pipe to a 8 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 10 in. pipe to 8 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
  • Hemmed collar edges to provide strength and a snug fit
Units: Each
Qty:

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Master Flow 5 in. to 4 in. 26-Gauge Flat Reducer
Master Flow 5 in. to 4 in. 26-Gauge Flat Reducer
Item # 311161301

The Master Flow 26 Gauge 5 in. x 4 in. Flat Reducer is made OG galvanized steel. Its short length makes it ideal for tight spaces. The reducer is used to transition from a 5 in. pipe to a 4 in. pipe system. It is suitable for most HVAC applications.

  • 26-Gauge, galvanized steel construction for durability
  • Connects 5 in. pipe to 4 in. pipe in duct run
  • Connect using sheet metal screws (not included)
  • Universal - not crimped
  • Can be crimped as needed
Units: Each
Qty:

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Master Flow 8 in. to 7 in. Round Reducer
Master Flow 8 in. to 7 in. Round Reducer
Item # 3570318

The Master Flow 8 in. x 7 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 8 in. pipe to a 7 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 8 in. pipe to 7 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
Units: Each
Qty:

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NATIONAL BRAND ALTERNATIVE PLASTIC REDUCER 4 IN. X 3 IN.
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Master Flow 6 in. to 4 in. 26-Gauge Flat Reducer
Master Flow 6 in. to 4 in. 26-Gauge Flat Reducer
Item # 311161302

The Master Flow 26 Gauge 6 in. x 4 in. Flat Reducer is made OG galvanized steel. Its short length makes it ideal for tight spaces. The reducer is used to transition from a 6 in. pipe to a 4 in. pipe system. It is suitable for most HVAC applications.

  • 26-Gauge, galvanized steel construction for durability
  • Connects 6 in. pipe to 4 in. pipe in duct run
  • Connect using sheet metal screws (not included)
  • Universal - not crimped
  • Can be crimped as needed
Units: Each
Qty:

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Master Flow 7 in. to 4 in. Round Reducer
Master Flow 7 in. to 4 in. Round Reducer
Item # 3570315

The Master Flow 7 in. x 4 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 7 in. pipe to a 4 in. pipe in an HVAC system. It is suitable for most HVAC applications.

  • 30-Gauge, galvanized steel construction for durability
  • Hemmed collar edges for an improved fit and increased strength
  • Connects 7 in. pipe to 4 in. pipe in duct run
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)
  • Always insulate ductwork for greater system efficiency and comfort (insulation not included)
Units: Each
Qty:

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Master Flow 7 in. to 6 in. 26-Gauge Flat Reducer
Master Flow 7 in. to 6 in. 26-Gauge Flat Reducer
Item # 311161303

The Master Flow 26 Gauge 7 in. x 6 in. Flat Reducer is made OG galvanized steel. Its short length makes it ideal for tight spaces. The reducer is used to transition from a 7 in. pipe to a 6 in. pipe system. It is suitable for most HVAC applications.

  • 26-Gauge, galvanized steel construction for durability
  • Connects 7 in. pipe to 6 in. pipe in duct run
  • Connect using sheet metal screws (not included)
  • Universal - not crimped
  • Can be crimped as needed
Units: Each
Qty:

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All American Supply 3X4 SINGLE WALL INCREASER N/C
Units: Each
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