Top 10 Duct Reducer 4 to 3 – HVAC Ducting

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1. Deflecto


Deflecto Duct Increaser and Reducer, White, 4” to 3” IRB43, Plastic Inline Adapter

Deflecto #ad - Durable polypropylene construction has a melting point of approximately 325 degrees. Designed to transition between 4" and 3" diameter ducts. Connects a 4 inch dryer exhaust hood to a 3 inch duct. Ideal for bathroom fan installations. Simply slip the ducts over the increaser/reducer, tightening in place with clamps not included.
BrandDeflecto #ad
ManufacturerDeflecto #ad
Height4 inches
Length4 inches
Weight0.1 pounds
Width3.4 inches
Part NumberDEFIRB43
WarrantyDeflecto Duct Plastic Increaser and Reducer, 4" to a 3", (IRB43)

2. The Sheet Metal Kid


& air Ventilation Systems Fittings, 6" X 4" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling

The Sheet Metal Kid #ad - Used to connect two air ducts of different diameters to create a seamless ventilation system duct. Perfect for use with either flexible duct or rigid sheet metal duct. Our sheet metal reducers and increasers are manufactured from the highest quality of galvanized steel. They are the perfect sheet metal fitting for changing duct sizes and utilized for maintaining the best airflow for maximum efficiency in your HVAC duct system.

If you have any kind of problem regarding our product we will fully co-operate in solving your problem. They are the perfect sheet metal fitting for changing duct sizes and utilized for maintaining the best airflow for maximum efficiency in your HVAC duct system. Do not miss the opportunity, simply click “ADD TO CART” to order yours today! Consider these reducers as a patch between your current unit and the ducting you want to run and see how easy it is to match up the two.

Sheet metal hvac duct reducer for flexible or metal hvac ducts and air vents. This duct is crimped on the small end of the duct to fit inside the next ducting section. You should never feel any hesitation in contacting us. Once it's in position can be sealed with duct sealer. We are willing for the satisfaction of our customers because customer satisfaction is our first priority. These galvanized duct reducers can be used with fans, ducting, air-cooled hoods, and ventilation systems, that allowing you to lengthen and extend your ducting.
BrandThe Sheet Metal Kid #ad
ManufacturerThe Sheet Metal Kid #ad
Height6 inches
Length6 inches
Width6 inches
Part Number5864



Big Horn 11318 3-Inch by 2-Inch Adapter

BIG HORN #ad - Used to connect 3-inch hose to 2-inch hose. Made of black ABS plastic. Designed for efficient air flow. For best connection use clamp not included.
BrandBIG HORN #ad
ManufacturerBig Horn #ad
Height3.1 Inches
Length3.5 Inches
Weight0.15 pounds
Width3.1 Inches
Part Number11318

4. Flex-Drain


Flex-Drain ADP53102 Downspout Adaptor, Landscaping Drain Pipe Adapter 3 by 4 by 4-Inch , Black

Flex-Drain #ad - Integrated soil-tight fittings lock securely and are perfect for French drains, downspout drain pipe and more!30-percent higher load-bearing rating than standard corrugated pipes, Minimum working temperature of -50°F and a maximum working temperature of 150°F. Installs faster than traditional corrugated pipes and requires 80% less space for transport and storage. Compatible with most traditional 3-inch and 4-inch corrugated pipe and 4-Inch PVC. Flex-drain's unique flexibility allows it to fit in tight spaces and curvy places.
BrandFlex-Drain #ad
ManufacturerFlex-Drain #ad
Height4 Inches
Length8 Inches
Weight0.04 pounds
Width4 Inches
Part Number53102
ModelAmerimax - ADP53102

5. Toolazy


Grow Tents, Hydroponics,Home use Ventilation and Exhaust Blower., Toolazy Quiet 4” Inline Duct Fan with 0-100% Variable Speed Controller, Ventilation Exhaust Fan Using for Heating Cooling Booster

Toolazy #ad - Package details : quiet 4” inline duct fan, variable speed controller, AC power plug, two conduit clamps and required installation hardware. This allows the embedded fan to run more quietly and reach low speeds without generating noise or heat.

Our inline blowers can also create negative pressure environments, exhaust odors and smoke as well as intake fresh air from outdoors. Toolazy 4” inline duct fan are used in indoor grow facilities and vertical farms, simulate wind, heating and cooling transfer, commercial drying and air filtration applications. Flexible control speed : choose any speed from 0 to 100% using the included variable speed controller without creating background noise or hum at low speeds.

Duct diameter : 4”100mm — airflow: 205cfm —power 40w —input voltage:ac110~240v, 50/60hz —speed:2600RPM/min —Noise: 28 dBA — Bearings: Dual Ball. Quiet and energy-saving performance is very good : ec motors with mixed flow design and PWM control can use precise electronic pulses. The energy efficiency of ec motors is also twice as high, and can save up to 40% of energy costs, and can recover costs in the long run.
BrandToolazy #ad
Height9.6 inches
Length13.2 inches
Width8.7 inches
Modelduct fan 4



DECFLO 20FT Nylon Chimney Cleaning Brush,Stiff Poly Chimney Sweeping Tool and Rods Kit-Dry Duct Clean Kit Lint Remover with Long Flexible Rods 1 Brush Head +10Rods

DECFLO #ad - Brush head made of nylon material, anti-aging, high-temperature resistance, not easy to corrode, making the sweep more efficiency. Can be used with an electric drill, with the help of large rotational force, the bristles can remove even the most stubborn build up inside the flue or chimney.

Easy to assemble and disassemble, and you can connect multiple rods to extend your reach. The rods are flexible which can perfectly get through those tough flue bends. Perfect for cleaning your chimney from the top down or up through your fireplace. Can be used with or without a power drill and save tons of your labour and time.

2. Cleaning your stove by yourself and save money. 3. Helps prevent flue fires. 5. It won‘t scratch the inner surface of the chimney flue. 4. Removing lint buildup from your dryer duct helps reduce drying time and improve dryer performance, while extending the life of your dryer. 1.
BrandDECFLO #ad
Weight1 pounds

7. Ansook


Universal Vacuum Hose Adapter 2-1/2 Inch to 1-1/4 Inch,1-1/4 Inch to 1-3/8 Inch to 1-1/2 Inch,1-3/8 Inch to 1-1/4 Inch Wet Dry Vacuum Converter Reducer Attachment Adapter kit for Vacuum Cleaner6pcs

Ansook #ad - It is convenient for you to change the diameter of the hose according to your needs, saving the trouble of sealing with tape before. Durable materialvacuum cleaner hose reducers are made of quality ABS plastic material, lightweight, not easy to break or damage, easy to apply, durable and stable, which you can apply for a long time.

Easy to installno additional tools required, just insert the end of the hose into the adapter to complete the installation. Package includesyou will receive 6 pieces of wet or dry vacuum hose converter with 3 different styles, adequate quantity and various styles give you wide choices for different occasions, and meet the replacement needs.

Warrantywe provides warranty and friendly after-sale service, makes sure the risk-free shopping for you. 3 sizes of vacuum hose1-3/8" to 1-1/4", which can make your vacuum cleaner have more chooses of brushes, meet your different needs in daily clean, 2-1/2" to 1-1/4", 1-1/4" to 1-3/8" to 1-1/2", and suitable for most vacuum.
BrandAnsook #ad
ManufacturerAnsook #ad
Length7.2 Inches
Part NumberWS25011A

8. Fernco


Fernco 1056-86 Flexible Pipe Coupling 8” CI/Plastic/Steel to 6” CI/Plastic/Steel

Fernco #ad - Specs & codes: conforms to astm d 5926, rustproof and make installing quick and easy with just a screwdriver, C 1173 CSA B602 and UPC Approved. Unmatched quality & performance: built for a 50-year service life, Fernco couplings are made from elastomeric polyvinyl chloride for a strong, leak-proof fitting that's resistant to chemicals and sewer gases.

No-mess installation: fernco couplings are easy to install without the hassle of messy primers, glues and their unwanted odors. Flexible fit: to choose the right coupling, measure the outside diameter, this coupling fits pipe ODs between 6 x 8.

51 x 8. 51 inches. 300 stainless steel clamps are corrosion-resistant, nut driver or torque wrench. Connect various pipe types: the fernco 1056-43 reducer coupling connects plastic PVC, CPVC, Smooth Wall HDPE, Steel or Lead Pipe for a watertight joint. For sewer and drain, abS, Copper, Cast Iron, waste and vent piping.
BrandFernco #ad
ManufacturerFernco Inc. #ad
Height8.51 Inches
Length6 Inches
Weight3 pounds
Width8.51 Inches
Part Number1056-86



Chimney Cleaning Kit Chimney Cleaner Air Duct Cleaning Kit Dryer Lint Brush Vent Cleaner Chimney Cleaning Brush Dryer Vent Cleaner Kit with 12 Flexible Rods, 16FT Chimney Sweep Kit, 6'' Brush Heads

LIGEAROW #ad - Preventing fire risks: lint buildup can be dangerous and failure to clean it is the leading cause of clothes dryer fires. Make your cleaning endeavors something that is more easier. Compared with ordinary kits, our chimney sweep kit will not loosen in any direction of rotation clockwise or counterclockwise.

Easy to use: this dryer duct cleaning kit can be used with an electric drill, increase the rotary power for more efficient cleaning, and save time and effort. High-quality chimney sweep kit: the chimney brush rods are made of reinforced nylon, elastic, high temperature resistance, chemically resistant, aging resistance, which makes the sweep more efficiency. Suitable for pipes in all shapes/sizes: the dryer cleaner vent kit is suitable for cleaning vent, duct and exhaust port of various shapes and sizes, such as crevices, dry vents, smoke hood, dryer, which can clean the lint and dust from hard-to-reach areas, etc.

Size and package: 12 x 16. 14inch flexible rods, 2 x 5. 9inch diameter dryer vent brush, 2 x hex tool. No need to pay a professional service cost $150 per cleaning when you buy our dryer duct cleaning kit, save your money. Easy to assemble and disassemble. You can easily connect multiple flexible nylon rods to extend your reach by yourselfextend up to 16FT. The rod is flexible and can easily pass the narrow areas, wood stove, exhaust pipe, such as chimney, and also the coils behind the refrigerator.
ManufacturerLIGEAROW #ad
Height16 inches
Length5.9 inches
Width5.9 inches

10. Oraimo


For Pet Hair Hard Floor Carpet Stair Dorm, Oraimo Cordless Vacuum, Stick Vacuum with Anti-entangle Floor Brush, 24KPA Vacuum Cleaner with 270W Brushless Motor, 4 HEPA, Up to 45min Runtime

Oraimo #ad - No need to wait for a long time, you can clean anytime you want. Larger led displaythis vacuum cleaner for home features a large led display panel, shows you the suction level and battery power. Thoughtful designoraimo cordless stick vacuum is self-standing, it comes with 4 HEPA, easy for storage.

Tangle defender brushoraimo stick vacuum comes with a unique tangle defender brush, which can effectively reduce hair entanglement and reduce your daily maintenance troubles. The upgraded charging technology reduces the charging time to 2. 5h. Also, enough for 1-year use, which can capture 99. 99% particles, and reduce second-hand pollution by releasing clean air. Up to 24kpa suctionwith upgraded 270w brushless motor, dust, effortlessly remove dirt, and stubborn dirt, pet hair, debris, Oraimo cordless vacuum cleaner provides up to 24kpa strong suction, leaving no residue after vacuuming.

Longer runtime& faster chargingpowered by 2500mah*6 detachable battery, you can enjoy up to 45min runtime for your daily cleaning. It also alerts you when the floor brush or air duct is blocked, or no installation of HEPA(Very important, it will affect the life of motor.
BrandOraimo #ad
ManufacturerOraimo #ad
Height7.68 inches
Length17.52 inches
Weight5.29 pounds
Width10.63 inches