--- product_id: 70148375 title: "neverest® RK 6\" Professional Backdraft Shutter Damper Connector Duct" brand: "neverest" price: "$72.55" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.ec/products/70148375-neverest-rk-6-professional-backdraft-shutter-damper-connector-duct store_origin: EC region: Ecuador --- # Automatic low-air volume flap with anti-rattle spring Operates from 14°F to 140°F temperature range Galvanized steel + aluminum flap for durability neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct **Brand:** neverest **Price:** $72.55 **Availability:** ✅ In Stock ## Summary > 🌬️ Neverest RK 6" – The silent guardian of your airflow, because your space deserves the best! ## Quick Answers - **What is this?** neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct by neverest - **How much does it cost?** $72.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/70148375-neverest-rk-6-professional-backdraft-shutter-damper-connector-duct) ## 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 - • **Quick & Hassle-Free Setup:** Simple insertion design with adjustable spring positioning for horizontal or vertical duct installations. - • **Effortless Airflow Control:** Automatic flap opens smoothly at minimal air pressure, optimizing ventilation efficiency without noise. - • **Built to Last, Engineered to Perform:** Galvanized steel body with stainless steel axis ensures unmatched durability and corrosion resistance. - • **Precision Seal for Ultimate Air Quality:** Internal foam strip prevents blade rattling and backdrafts, maintaining clean, fresh airflow. - • **Versatile Installation, Maximum Compatibility:** Fits both flexible and rigid metal ducts, perfect for HVAC, dryers, exhausts, and more. ## Overview The neverest® RK 6" Professional Backdraft Shutter Damper Connector is a robust ventilation accessory crafted from galvanized steel with an aluminum flap and stainless steel components. Designed to prevent unwanted air backflow, it operates automatically at low air volumes with a noise-reducing foam seal. Suitable for both flexible and rigid metal ducts, it supports a wide temperature range (14°F to 140°F) and installs easily in horizontal or vertical positions, making it ideal for HVAC systems, dryers, and exhaust vents. Backed by a 2-year warranty and trusted by thousands, it’s the professional choice for optimized indoor air quality. ## Description Neverest - Provides a range of different products, tools and knowledge to help you get the best ventilation solutions. Professional Ventilation Accessories for Optimal Indoor Climate. For your health, your well-being, and your performance. Ventilation systems have several advantages - witness your quality of life, your health and happiness improve every day. Application Areas: Heating Systems and ventilation systems in private households, trade and industry. Smoking areas, residential house ventilation, greenhouses, indoor plant cultivation, restaurants, clubs, offices and garages. ## 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 | | Best Sellers Rank | #71,797 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #152 in HVAC Ducting #2,097 in Pipe Fittings | | Brand Name | neverest | | Color | Silver | | Connector Type | Trap | | Customer Reviews | 4.5 4.5 out of 5 stars (2,081) 4.5 out of 5 stars | | Exterior Finish | Galvanised steel | | Global Trade Identification Number | 04054503005327 | | Item Dimensions | 3.46 x 5.91 x 5.91 inches | | Item Weight | 209 g | | Manufacturer | neverest | | Manufacturer Part Number | 40545030039031 | | Manufacturer Warranty Description | 2 years | | Material Type | Alloy Steel | | Model Number | 4054503005327 | | Number Of Packs | 1 | | Number Of Pieces | 1 | | Size | 6 Inch | | Thread Size | 6 inch | | Thread Type | Metric Tapered | | Unit Count | 1 Count | ## 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 - Image 1](https://m.media-amazon.com/images/I/61R-zDPpQKL.jpg) ![neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct - Image 2](https://m.media-amazon.com/images/I/71yHhpfAVDL.jpg) ![neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct - Image 3](https://m.media-amazon.com/images/I/71YpD9hap4L.jpg) ![neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct - Image 4](https://m.media-amazon.com/images/I/71WA4lhgp7L.jpg) ![neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct - Image 5](https://m.media-amazon.com/images/I/81jyaGUUllL.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 on Reviewed in the United States 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 on Reviewed in the United States 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. ### ⭐⭐⭐⭐ Trim shaft, weaken spring first *by on Reviewed in the United States December 18, 2021* Shaft sticks out about 1/16 ea side of insert, so I had to trim flush since the fit is skin tight inside standard vent duct on a mobile home rent trailer. I should have weakened the spring before installing since full power fan struggles to open against spring pressure even AFTER ensuring gaps taped with flashing tape. I should have used Hardcast tape ( gooey alum) since I didn't thoroughly clean the area there. The regular stuff isn't stuck well, but I'm thinking the fan motor is due for retirement. It's been getting louder last couple years, and took it out,cleaning w/oil spa didn't do any noticeable good. Sure it works, but it's noisy and underrated and im sure next renter would rather not have a jank hood motor hollarin all thru din. No sense in half measures ol W.W. right about a lot of stuff xsept his biz model one of many others none ive known ended well in that genre. Anyway, hope u learned at least trim the shaft flush to fit inside duct and cavity needs sealed good if the motor has any chance of opening the check against the spring. I'd weaken the spring if I could groundhog day it, but for now ima order another motor since I'm looking for a top shelf tenant in this turd box and that means minimal janky noises or fixes that look daf. It's a nice turd box tho so i put in air fry oven, bidets, bt showerhead. WM fire sale'd at $10/ea so i see it as cheap turd polish loaded the cartGot back and one tenant lit up big smile 😀 bidet!!yay! Totally worth and still 20 of each in my truck. Trailer park Santa feeling warm n fuzzy except wearing old denim bibs and muddy boots. Proper attire all things considered. ## Frequently Bought Together - neverest® RK 6" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts - EesTeck 4Pcs 6" Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps（141mm-165mm） - AC Infinity Flexible 6-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/70148375-neverest-rk-6-professional-backdraft-shutter-damper-connector-duct](https://www.desertcart.ec/products/70148375-neverest-rk-6-professional-backdraft-shutter-damper-connector-duct) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-15*