---
product_id: 70148375
title: "neverest® RK 6\" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts"
brand: "neverest"
price: "€ 44.58"
currency: EUR
in_stock: true
reviews_count: 13
category: "Neverest"
url: https://www.desertcart.it/products/70148375-neverest-rk-6-professional-backdraft-shutter-damper-connector-duct-fits
store_origin: IT
region: Italy
---

# Automatic low-pressure flap operation Operates from 14°F to 140°F Galvanized steel + aluminum flap for durability neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts

**Brand:** neverest
**Price:** € 44.58
**Availability:** ✅ In Stock

## Summary

> 🚀 Seal the deal on airflow—never let a draft cramp your style!

## Quick Answers

- **What is this?** neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts by neverest
- **How much does it cost?** € 44.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/70148375-neverest-rk-6-professional-backdraft-shutter-damper-connector-duct-fits)

## Best For

- neverest enthusiasts

## Why This Product

- Trusted neverest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Airflow Control:** Automatic flap opens and closes smoothly at minimal air pressure, eliminating drafts and noise with a built-in foam strip.
- • **Versatile HVAC Compatibility:** Perfectly fits 6-inch metal ducts for ACs, dryers, exhausts, and heating systems—engineered for professional-grade installations.
- • **Quick & Hassle-Free Installation:** Insert and secure in minutes with clear directional flow arrows; designed exclusively for metal ducts to guarantee optimal performance.
- • **Certified Quality & Peace of Mind:** Backed by a 2-year warranty and trusted by professionals to meet city code requirements for commercial and residential use.
- • **Built to Last, Engineered to Perform:** Galvanized steel body with aluminum flap and stainless steel spring ensures unmatched durability and corrosion resistance.

## Overview

The neverest® RK 6" Professional Backdraft Shutter Damper is a premium HVAC accessory crafted from galvanized steel with an aluminum flap and stainless steel spring. Designed exclusively for 6-inch metal ducts, it automatically prevents unwanted air backflow with minimal pressure, operating efficiently between 14°F and 140°F. Ideal for air conditioners, dryers, exhausts, and heating ducts, it installs quickly and meets professional and city code standards, backed by a 2-year warranty.

## Description

Buy neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts: Heater Control Valves - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Neverest® RK 5" is an Excellent duct damper and Works with the slightest amount of air movement. - Excellent duct damper. I order and received a different 5" damper bade by ECOPRO originally but there were two springs on the 5" damper flaps, and it took quite a force to push open the flaps, so I ended up returning that and ordering the Neverest® RK 5" Backdraft Shutter Damper. The damper opens with a minimal amount of pressure and the quality of the unit is great. My issue was that we have a down draft cooktop and when there was a descent amount of wind outside, we would get a flow of cold air (IT was in the early spring) blowing out the downdraft grill on the cooktop, so I needed to prevent the wind draft from blowing into the ducting from outside. I installed the Backdraft Shutter Damper in a 5" metal flexible duct, and it took about 45 minutes from start to finish to complete the job. Now even with the slightest outside breeze the damp shuts and does not allow any draft into the house!
Review: Good Quality- Worked For City Code Inspection Requirement For Outdoor Commerical Dryer - Good Quality- Worked for City Code Inspection Requirement for outdoor Commerical Dryer. Install straight forward with arrows as directed for flow / operation of ducting flapper. Installed with very short sheet metal screws to prevent lint build up inside ducting. Can be installed with hose clamps if non city code requirement.

## Features

- DURABLE The 6 in backdraft damper features galvanized steel construction with aluminum flap, stainless steel axis, and spring. It's 3.5 inches deep and can withstand temperatures from 14 to 140 °F. This air duct damper effectively prevents air from entering through the ventilation duct.
- AUTOMATIC OPERATION The 6 inch duct damper backflow flap opens and closes effortlessly at low air volumes. It includes a smooth-running spring and an internal foam strip to prevent blade rattling. Can be installed horizontally or vertically.
- VERSATILE APPLICATIONS This inline vent draft blocker is ideal for air conditioners (AC), dryers, exhaust and extractor hoods, heating ducts, vents, and various HVAC systems.
- QUICK SETUP Install the dryer vent damper by inserting it into the ventilation pipe. Position the spring horizontally for optimal opening and closing in horizontal installations. Ensure damper blades open only in the outflowing air direction.
- NOTE Our backdraft exhaust fan damper is suitable for both flexible and non-flexible ventilation ducts. However, it is essential to install them exclusively in metal ducts. Before purchase, measure the diameter of your duct to ensure compatibility.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B011IUUK96 |
| Assembled Diameter | 150 Millimeters |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #106,223 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #174 in HVAC Ducting #6,153 in Pipe Fittings |
| Brand | neverest |
| Color | Silver |
| Connector Type | Trap |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,004) |
| Cutting Diameter | 150 Millimeters |
| Date First Available | July 25, 2016 |
| Exterior Finish | Galvanised steel |
| Finish | Steel |
| Global Trade Identification Number | 04054503005327 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 7.4 ounces |
| Item model number | 4054503005327 |
| Manufacturer | neverest |
| Material | Alloy Steel |
| Number of Pieces | 1 |
| Part Number | 40545030039031 |
| Size | 6 Inch |
| Thread Size | 6 inch |
| Thread Type | Metric Tapered |
| Usage | Use in air conditioners (AC), dryers, exhaust, extractor or range hoods, heating ducts, vents, and other HVAC applications. |
| Warranty Description | 2 years |

## Product Details

- **Brand:** neverest
- **Color:** Silver
- **Connector Type:** Trap
- **Exterior Finish:** Galvanised steel
- **Item Weight:** 209 Grams
- **Item dimensions L x W x H:** 3.46 x 5.91 x 5.91 inches
- **Material:** Alloy Steel
- **Size:** 6 Inch
- **Thread Size:** 6 inch
- **Thread Type:** Metric Tapered

## Images

![neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts - Image 1](https://m.media-amazon.com/images/I/61R-zDPpQKL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Neverest® RK 5" is an Excellent duct damper and Works with the slightest amount of air movement.
*by E***F on April 15, 2025*

Excellent duct damper. I order and received a different 5" damper bade by ECOPRO originally but there were two springs on the 5" damper flaps, and it took quite a force to push open the flaps, so I ended up returning that and ordering the Neverest® RK 5" Backdraft Shutter Damper. The damper opens with a minimal amount of pressure and the quality of the unit is great. My issue was that we have a down draft cooktop and when there was a descent amount of wind outside, we would get a flow of cold air (IT was in the early spring) blowing out the downdraft grill on the cooktop, so I needed to prevent the wind draft from blowing into the ducting from outside. I installed the Backdraft Shutter Damper in a 5" metal flexible duct, and it took about 45 minutes from start to finish to complete the job. Now even with the slightest outside breeze the damp shuts and does not allow any draft into the house!

### ⭐⭐⭐⭐⭐ Good Quality- Worked For City Code Inspection Requirement For Outdoor Commerical Dryer
*by D***R on May 20, 2025*

Good Quality- Worked for City Code Inspection Requirement for outdoor Commerical Dryer. Install straight forward with arrows as directed for flow / operation of ducting flapper. Installed with very short sheet metal screws to prevent lint build up inside ducting. Can be installed with hose clamps if non city code requirement.

### ⭐⭐⭐⭐⭐ I am thrilled!
*by A***I on February 8, 2024*

I had two vents that were banging very loudly when it was a windy day. My vent for the hood over my stove was 5" and the other vent (from my dryer) was 4". So, I am glad I purchased both sizes. Don't assume you know the size. Anyways, these work GREAT. I do have a plastic cover that hides them from the outside, but all of that terrible banging has stopped. Occasionally, I will hear them open and close, but they are much quieter due to the rubber seal inside. Great product and builders really need to install these instead of those loud clanging plastic ones! Thank you for a great product!!

## Frequently Bought Together

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-10*