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: 50008731

Details

Brand
neverest
Colour
Silver
Connector type
Pipe connector
Exterior finish
Aluminium
Item dimensions L x W x H
57 x 52 x 40
Item weight
140 Grams

🔇Rubber sealing ensures silent operation

⚙️Stainless steel springs for automatic closing

🛠️Galvanized steel housing for durability

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Description

🌬️ Seal in comfort, shut out the noise — ventilation perfected.

SMART AIRFLOW CONTROL - Automatic backdraft damper blocks unwanted cold or warm air, optimizing your indoor climate effortlessly.
ROBUST RELIABLE BUILD - Galvanized steel and aluminum blades engineered for long-lasting ventilation performance.
VERSATILE COMPATIBILITY - Fits all standard 100mm metal ducts and flexible pipes, perfect for HVAC, whole-house ventilation, and heat recovery systems.
WHISPER QUIET OPERATION - Rubber sealing and precision springs guarantee noiseless opening and closing—no more disruptive clatter.
EASY INSTALLATION MAINTENANCE - Lightweight 140g design with expert-backed support ensures a hassle-free upgrade to your ventilation setup.

The neverest® RK 4 inch Backdraft Shutter is a premium galvanized steel ducting connector designed exclusively for metal ducts. Featuring aluminum damper blades, stainless steel springs, and a rubber sealing ring, it ensures automatic, silent closure to prevent backflow of air. Ideal for HVAC, whole-house ventilation, and heat recovery systems, this 100mm duct fitting combines durability with quiet efficiency, backed by over 40 years of ventilation expertise.

Specifications

ASIN	B011INHF5A
Best Sellers Rank	126,907 in DIY & Tools ( See Top 100 in DIY & Tools ) 557 in Registers, Grilles & Vents
Brand	neverest
Colour	Silver
Connector Type	Pipe connector
Country of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (2,046)
Exterior Finish	Aluminium
Item Dimensions	57 x 52 x 40 centimetres
Item Weight	140 Grams
Manufacturer	neverest
Material	Alloy Steel, Rubber, Stainless Steel
Number of Pieces	1
Part Number	40545030039031
Size	100mm
Thread Size	100
Thread Type	UN
Unit Count	1.0 count

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R$385

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Brazil.

Secure transaction

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