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 inch Backdraft Shutter 100mm Ducting Connector Galvanized Steel with Rubber Sealing Fits Only with Metal Ducts

neverest® RK 4 inch Backdraft Shutter 100mm Ducting Connector Galvanized Steel with Rubber Sealing Fits Only with Metal Ducts

Product ID: 409695865

Details

Brand
neverest
Colour
Silver
Item dimensions L x W x H
57 x 52 x 40
Material
Steel
Size
100mm

🔄Automatic backdraft shutter with stainless steel springs

🔇Rubber sealing ensures 100% quiet, airtight closure

🛠️Galvanized steel housing for ultimate durability

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S$41

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Description

🚀 Elevate your airflow game with neverest® – where durability meets silent precision!

BUILT TO LAST - Galvanized steel and aluminum blades deliver unmatched robustness for your ventilation system.
VERSATILE FIT - Designed exclusively for metal ducts, compatible with all common 100mm round ventilation pipes.
TRUSTED EXPERTISE - Backed by 40+ years of ventilation mastery, ensuring reliable performance and easy installation.
WHISPER QUIET SEAL - Rubber ring guarantees silent operation and perfect airtightness—no more noisy ducts.
SMART AIRFLOW CONTROL - Automatic shutter opens with exhaust airflow and closes instantly to block unwanted drafts.

The neverest® RK 4 inch Backdraft Shutter is a premium galvanized steel ducting connector featuring aluminum damper blades and stainless steel springs for automatic, silent closure. Designed exclusively for metal ducts with 100mm diameter, it prevents unwanted air backflow while ensuring quiet, airtight sealing. Ideal for HVAC, ventilation, and heat recovery systems, this robust component is backed by over 40 years of industry expertise.

Specifications

ASIN	B011INHF5A
Best Sellers Rank	#49,090 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #162 in Registers, Grilles & Vents
Brand	neverest
Brand Name	neverest
Color	Silver
Colour	Silver
Connector Type	Pipe connector
Connector type	Pipe connector
Customer Reviews	4.4 out of 5 stars 1,194 Reviews
Exterior Finish	Galvanised steel
Item Dimensions	57 x 52 x 40 centimeters
Item Weight	140 Grams
Item dimensions L x W x H	57 x 52 x 40 centimeters
Manufacturer	neverest
Manufacturer Part Number	40545030039031
Material	Steel , galvanized
Material Type	Steel, galvanized
Number of Pieces	1
Size	100mm
Thread Size	100
Thread Type	UN
Unit Count	1.0 Count

Reviews

J**H

Qualität bestens. In Dunstabzugsrohr verbaut und öffnet auch in geringster Stufe

Qualität ist absolut einwandfrei. Öffnet schon auf Stufe 1 meiner Abzugshaube. Ist zwar etwas kleiner als der Rohrinnendurchmesser, dafür passt es aber rein und kann ggf. mit Panzertape ausgeglichen werden. Ich bin damit sehr zufrieden.

11.03.2021

D**L

Très bonne qualité

Facile à installer, fait le job, reste à voir sur la durée.

5.03.2026

P**R

A good purchase

26.01.2022

M**S

Worth the money

10.08.2020

T**T

コスパいい。注意あり

逆流防止弁なかなか売ってないので助かった。開いた板を戻すために動作するバネがゆるいので少し調整しました。弱い風量でも開くようにゆるくしてあるのかな？ただ弱すぎて風を上から下に下ろす箇所に設置すると蓋が自重の重さで戻らない。換気扇止めても開いたままになって虫が入る可能性があるので、下から上に風を流して自重でも閉まるようにダクトを調整しました。取り付けに注意すれば安いし機能するのでコスパいい製品です。

2.04.2021

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