Hi, is the 5" made to go on to 5" duct

I purchsaed the 4 inch for my clothes dryer exhaust vent to the outside of my house. They are true to size and a 5 inch should fit a 5 inch duct perfectly. This is an excellent addition to either a stove vent or clothes dryer vent. It prevents back draft air from entering the duct and also prevents conditioned air from escaping my house.

Hi - would it be best to put this at the end of the vent (near the outside) or on the house closest to the dryer? My vent is installed in the soffit.

Always at the end of the vent where the air exhaust to the outside of your house. You want to keep cold and hot air from being forced into your house on windy days as well as insect and birds from nesting. I have one on my kitchen stove vent on the outside brick wall and on my dryer vent on the side of my house. Before i installed it my laundry room was cold all winter from wibd being forced in.

For my cooktop vent, i have a broken plastic damper i need to replace. this one is 5.5in od, what product would work for this?

I,m using a reducer on the top of the vent hood over the cook top from 5 inch vent to 4 inch duct and then i am using the 4 inch pressure activated back draft your referring to on the outside wall with an ordinary clothes dryer rain shield over the opening. The dryer vent pipe cover should have a wind / rain shield incorporated in it. Most dryer vent covers have a plastic door which does not permit a positive closer in windy conditions. I also have the spring loaded damper door on my clothes dryer. These doors are great for preventing blow back into your house when either the cooktop vent or dryer are not in use.

Do u make a 7 inch inline damper?

Good Morning, the RK is available in 160mm or 200mm

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neverest® RK 4" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts

neverest® RK 4" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts

Product ID: 91224614

Details

Brand
neverest
Color
Silver
Connector Type
Flange
Exterior Finish
Aluminum
Item Weight
140 Grams
Item dimensions L x W x H
22.44 x 20.47

💨Opens with minimal air pressure

🌡️Operates from 14°F to 140°F

🛠️Galvanized steel & aluminum build

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329 DH

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In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
neverest
Color
Silver
Connector Type
Flange

Description

🚀 Seal out drafts, seal in comfort — the pro’s choice for flawless airflow!

SILENT OPERATION - Internal foam strip and smooth spring mechanism eliminate rattling for a peaceful environment.
PREMIUM DURABILITY - Galvanized steel body with aluminum flaps ensures long-lasting, rust-resistant performance.
QUICK EASY INSTALLATION - Designed for metal ducts with simple insertion and optimal spring positioning—get it up and running in under an hour.
EFFORTLESS AIRFLOW CONTROL - Backdraft damper opens automatically at low air volumes, preventing unwanted drafts with zero hassle.
VERSATILE HVAC COMPATIBILITY - Perfectly engineered for ACs, dryers, exhausts, range hoods, and heating ducts—your all-in-one ventilation solution.

The neverest® RK 4" Professional Backdraft Shutter Damper is a high-quality ventilation accessory crafted from galvanized steel and aluminum. It automatically prevents backflow of air and wind through metal ducts, operating efficiently between 14°F and 140°F. Designed for seamless integration with HVAC systems including air conditioners, dryers, and exhaust vents, it features a silent, spring-loaded flap that opens with minimal air pressure. Easy to install and built to last, this damper ensures optimal airflow control and energy efficiency in professional and home environments.

Specifications

ASIN	B011INHF5A
Best Sellers Rank	#117,728 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #205 in HVAC Ducting
Brand	neverest
Brand Name	neverest
Color	Silver
Connector Type	Flange
Customer Reviews	4.5 out of 5 stars 2,027 Reviews
Exterior Finish	Aluminum
Item Dimensions	22.44 x 20.47 x 15.75 inches
Item Weight	140 Grams
Item dimensions L x W x H	22.44 x 20.47 x 15.75 inches
Manufacturer	neverest
Manufacturer Part Number	40545030039031
Manufacturer Warranty Description	2 years
Material	Galvanized Steel
Material Type	Galvanized Steel
Number of Pieces	1
Size	4 Inch
Thread Type	CW
Unit Count	1 Count

Reviews

E**F

15.04.2025

D**R

20.05.2025

A**I

8.02.2024

J**.

18.12.2021

L**Y

22.12.2024

K**E

4.01.2026

M**L

3.08.2025

W**E

27.12.2025

R**S

12.11.2025

L**E

21.12.2025

J**H

11.03.2021

D**L

5.03.2026

H**L

10.05.2025

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