Duct Reducers & Increasers
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
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.
- 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)
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.
- 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
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.
- 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
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.
- 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)
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.
- 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
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.
- 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)
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.
- 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)
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
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.
- 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)
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.
- 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)
Rectorseal Slimduct 3.75"-2.75" Reducer, White 100-77. Reducers Offer An Aesthetically Pleasing Transition From A 3.75" (100mm) Duct To A 2.75" (77mm) Duct. Weather resistant PVC, UV stabilized & fire resistant. Tested to over 2,000 hours. Temperature range -4°F to 140° F. Complements any residential or commercial building. Available in SD77 (2 3/4"), SD100 (3 3/4"), SD140 (51/2") and 4 color options (white, ivory, black and brown). 78" duct lengths and 15 fittings ensure complete flexibility of installation. Mfg #85106
- Reducers Offer An Aesthetically Pleasing Transition From A 3.75" (100mm) Duct To A 2.75" (77mm) Duct.
- Weather resistant PVC, UV stabilized & fire resistant. Tested to over 2,000 hours. Temperature range -4°F to 140° F
- Complements any residential or commercial building. Available in SD77 (2 3/4"), SD100 (3 3/4"), SD140 (51/2") and 4 color options (white, ivory, black and brown)
- 78" duct lengths and 15 fittings ensure complete flexibility of installation
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
Flex Adapters connect the Flexible Elbow to the 3.75" (100mm) Duct. . Weather Resistant Pvc, Uv Stabilized & Fire Resistant. Tested To Over 2,000 Hours. Temperature Range -4°f To 140° F. Complements any residential or commercial building. Available in SD77 (2 3/4"), SD100 (3 3/4"), SD140 (51/2") and 4 color options (white, ivory, black and brown) . 78" duct lengths and 15 fittings ensure complete flexibility of installation. Mfg #85109
- Flex Adapters connect the Flexible Elbow to the 3.75" (100mm) Duct.
- Weather resistant PVC, UV stabilized & fire resistant. Tested to over 2,000 hours. Temperature range -4°F to 140° F
- Complements any residential or commercial building. Available in SD77 (2 3/4"), SD100 (3 3/4"), SD140 (51/2") and 4 color options (white, ivory, black and brown)
- 78" duct lengths and 15 fittings ensure complete flexibility of installation
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.
- 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)
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.
- 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)