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Kikerike

4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black

  • Based on 1,297 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Aug 18
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Size: 4 Inch


Color: Black


Features

  • MaterialThe 4 inch backdraft damper is made of a Galvanized steel with powder coat, the flap leaves are made of aluminum
  • InstallationThe backdraft damper is installed by pushing it into the ventilation pipe as far as it will go. The position of the spring should be horizontal when the flap is installed horizontally so that it can be opened and closed optimally. This also applies to the vertical installation
  • FunctionThis airflow regulating backdraft shutter fits over the TD lip and is designed to improve ventilation by preventing air from re-circulating when the fans are not in use
  • Wide Application These backdraft dampers can be widely used in ACs, exhaust fans, extractors, range hoods, heating ducts, vents and other residential, commercial and industrial applications
  • NoteBack draught valves can be inserted into ventilation ducts which are flexible or non flexible. Cannot be used with plastic ducts as the sizes are different. All dimensions are measured manually, please allow 1-3mm differences

Description

The backdraft damper is made of a Galvanized steel with powder coat, the flap leaves are made of aluminum Designed for use in AC, dryer vent, exhaust, extractor or range hoods, fans, vents and other residential, commercial and industrial HVAC applications. Please consult and pay attention to product size before buying. Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens.

Color: Black


Brand: Kikerike


Maximum Gap Fill: 4 inches


Number of Pieces: 1


Manufacturer: Kikerike


Brand Name: Kikerike


Number of Pieces: 1


Manufacturer: Kikerike


Manufacturer Part Number: DB-4in-black


Color: Black


Maximum Gap Fill: 4 inches


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • JUST WHAT i NEEDED
Size: 6 Inch Color: Black
WELL CONSTRUCTED, SHOULD WORK PERFECT
Reviewed in the United States on July 26, 2026 by Robert
    • Function. Durability. Easy install. What most products should focus on
Size: 6 Inch Color: Silver
Wasnt avail at big box stores near me so I scrambled to order this for my contractor installing the ductwork for my new kitchen stove vent. He said it was perfect and easy to install. It seems to be working great and our city inspector specifically went out of his way to check it. Passed without issue. Recommended. ... show more
Reviewed in the United States on March 27, 2026 by Chris B
    • Works and easy to install
Size: 4 Inch Color: Black
Stops outside air from coming into the dryer. Easy to install, ensure you get the airflow direction correct.
Reviewed in the United States on May 7, 2026 by Saints Fan and Dad
    • worked, but needed some mods
Size: 6 Inch Color: Silver
Although the documentation said it would work in a vertical installation, that didn't work for me. The spring controlling the damper blades was too strong and it barely opened when my 250 CFM range hood was on high speed, using 6 inch stack ducting. I used some snippers to cut the spring out of the damper and just rely on gravity to close the two doors and it worked perfectly. The housing is rigid enough to maintain its round shape to prevent binding of the damper doors. It has some foam strips which help the doors seal very nicely. ... show more
Reviewed in the United States on July 15, 2026 by NAChattin
    • Works well
Size: 6 Inch Color: Black
Works well and open completely with a over the range microwave hood.
Reviewed in the United States on June 19, 2026 by RBF
    • Proper installation means everything!
Size: 4 Inch Color: Silver
I read the lower than 3 star reviews before I purchased and I purchased anyway. Of course there was no instructions but I’m familiar with these things. This damper needs to be installed in the correct orientation. Hinged doors open to the outside. It needs to be connected to the existing 4” exhaust pipe with foil tape (ensure no leakage) on both sides with the spring hinge in a horizontal or vertical position. If you follow those simple rules this thing works great! My 50 CFM fan moved air with no issues and there is no air from the windy outside pushing back into the house. I would say that the closer you install this damper to the outside damper that is attached to your house, the better your results. I would buy this again. Correct installation is everything. ... show more
Reviewed in the United States on January 18, 2026 by bussboy
    • I can’t believe it worked so well
Size: 4 Inch Color: Silver
Each time the A/C or furnace kicked on it would draw outside air in through the vent hood. Cold in the winter and hot in the summer. The temperature under the hood was significant and very noticeable. So I installed this draft blocker in the pipe in the attic, separating the pipe at a joint inserting the valve and reconnecting the pipes. I seal the joints with aluminum tape. The draft blocker has a weather strip inside sealing it when not in use. I did have to reseal the pipe where it passed through the roof with roof tar to restore the water seal. It works great, the is no back draft now when the A/C is running and made a huge difference. I would recommend and buy again. ... show more
Reviewed in the United States on November 22, 2025 by Daryl l Jernigan
    • Great product for great price
Size: 6 Inch Color: Silver
Great product. Great seller. Fast delivery. Product was as described. Will definitely recommend
Reviewed in the United States on July 17, 2026 by Stefan Craciun

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