--- product_id: 151007683 title: "neverest® RKI 5\" Professional Backdraft Damper Inline Spring Loaded" price: "€ 27.80" currency: EUR in_stock: true url: https://www.desertcart.ie/products/151007683-neverest-rki-5-professional-backdraft-damper-inline-spring-loaded store_origin: IE region: Ireland --- # 5-inch precision fit spring-loaded auto flap for airflow control galvanized steel & stainless steel build neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded **Price:** € 27.80 **Availability:** ✅ In Stock ## Summary > 🌬️ Keep your airflow flawless, your space silent, and your system smart. ## Quick Answers - **What is this?** neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded - **How much does it cost?** € 27.80 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/151007683-neverest-rki-5-professional-backdraft-damper-inline-spring-loaded) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Silent Efficiency:** Rubber sealing strip eliminates rattling, delivering whisper-quiet operation in any HVAC setup. - • **Effortless Installation:** Push-in design with spring orientation guidance for quick, hassle-free setup—no extra tools required. - • **Seamless 5" Integration:** Perfectly engineered for standard 5-inch metal ducts, ensuring a snug, retrofit-ready fit. - • **Versatile HVAC Compatibility:** Optimized for dryers, exhausts, range hoods, and heating systems across residential, commercial, and industrial spaces. - • **Durable Industrial-Grade Materials:** Galvanized steel housing with aluminum blades and stainless steel spring for unmatched longevity and corrosion resistance. ## Overview The neverest® RKI 5" Professional Backdraft Damper is a spring-loaded inline flap designed for 5-inch metal ventilation ducts. Constructed from galvanized steel, aluminum, and stainless steel, it prevents unwanted backflow and cold air intrusion while ensuring silent operation through a rubber seal. Ideal for diverse HVAC applications, it installs easily in both horizontal and vertical orientations, making it a reliable upgrade for residential, commercial, and industrial ventilation systems. ## Description neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded | Inline Spring Loaded for Dryer Duct Fits Only with Metal Ducts - desertcart.com ## Features - ⚙️ PRODUCT FEATURES The backflow damper RKI opens and closes automatically. It has a strong spring and can be installed either horizontally or vertically. The flap is suitable for retrofitting since it is completely inside the duct. Backdraft damper for insertion into 5 inch ventilation ducts. - ⚙️ PREMIUM MATERIAL The housing of the flap is made of galvanized steel. The flap blades are made of aluminum, while the axle and spring are made of stainless steel. Tight sealing and fastening of the duct are achieved by the rubber strip attached to the outside of the draft blocker damper. The rubber seal prevents loud rattling when the flap blades open and close. - ⚙️ MULTI-USE Designed for use in AC, dryers, exhaust, extractor or range hoods, heating systems, vents, and other residential, commercial, and industrial HVAC applications. Please note that this is to be installed in metal ducts only. Measure the diameter of your duct before purchasing. - ⚙️ PERFORMANCE Duct draft stopper prevent cold air or wind from entering the ventilation pipe. In this case, the flap is installed in such a way that the flap leaves only open into the outgoing air direction. This means that no (cold) air/wind can penetrate the ventilation pipe from the outside. - ⚙️ EASY INSTALLATION The backflow Preventer valve is installed by pushing it into the ventilation pipe as far as it will go. The position of the spring should be horizontal when the flap is installed horizontally so that it can be opened and closed optimally. This also applies to the vertical installation. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | neverest | | Part Number | 4054503009868 | | Item Weight | 5.3 ounces | | Country of Origin | China | | Item model number | Backdraft Damper RKI 125 | | Is Discontinued By Manufacturer | No | | Size | 5 inches | | Color | Silver | | Style | Industrial | | Finish | Stainless | | Material | Stainless Steel | | Pattern | Galvanized Steel Backdraft for Dryer Duct | | Shape | Circular | | Number Of Pieces | 1 | | Special Features | Easy to Install | | Usage | Residential, commercial, and industrial HVAC applications | | Batteries Included? | No | | Batteries Required? | No | ## Images ![neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded - Image 1](https://m.media-amazon.com/images/I/71H9GJrhllL.jpg) ![neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded - Image 2](https://m.media-amazon.com/images/I/71ZECHnJT2L.jpg) ![neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded - Image 3](https://m.media-amazon.com/images/I/71d0obPicDL.jpg) ![neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded - Image 4](https://m.media-amazon.com/images/I/71Ibbi1FDaL.jpg) ![neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded - Image 5](https://m.media-amazon.com/images/I/71YSAWRU6sL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How much pressure does it take to open? No rating is given (in comparison, the expensive Aldes brand gives 0.04 to 0.08 in. w.g.)** A: Thank you for your question. Ive uploaded a graph, in metric, which hopefully you can use if your aware of your ventilators specs. It can be found under the product pictures. Otherwise you need 10 pascals to open the vent in a 4 inch duct. The spring is relatively strong on our RKI series the RK series has a weaker spring. Because the RKI has a stronger spring we suggest it be installed after the ventilator with the flaps opening away from the ventilator. Hope this helps klimapartner **Q: In a *horizontal* duct installation, is there an optimal orientation for the spring/blades? (e.g., orient spring horizontally or vertically)? Thanks.** A: Thank you for your questoin. If you install the damper parallel, horizontal, to the ground it doesnt matter which way the sping/blades are. If you intsall the backdraft shutter vertically you want the blades/springs perpendicular to the ground. For further questions please dont hesitate to ask. sincerely, klimapartner **Q: My vent lines are already merged below the roof, to a 90° 4" vent roof pipe cover. Will your cover work for me? My old flapper broke.** A: Thank you for your question. Yes our backdraft shutter will work for you as long as you have a strong enough ventilator to push it open from that distance. The springs are stronger on the RKI then our RK model. If you install, which we recomend, the shutter right behind your ventilator you will not have any problems. The joy of the RKI series is that you can order it, install it without much hassle and if it doesnt work send it back. The RK 4 inch series https://www.amazon.com/dp/B011INHF5A has a weaker spring. This would also work and you need to connect it between two ducts. sincerely team klimapartner **Q: Go a kitchen exhaust should this be installed close to the fan or closer to the exterior wall.** A: If your goal is keeping the cold or hot air out of the house, it should be installed near the exterior wall of house. It will attract less grease build up the further away from hood and it will be easier to service or clean if you can access it from the outside rather than opening up interior walls. ## Frequently Bought Together - neverest® RKI 5" Professional Backdraft Damper Inline Spring Loaded for Dryer Duct Fits Only with Metal Ducts - EesTeck 5" Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 118mm-140mm) - UNITED STATES HDW GV0291-C 5" Adjustable 30GA Furnace Elbow --- ## 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.ie/products/151007683-neverest-rki-5-professional-backdraft-damper-inline-spring-loaded](https://www.desertcart.ie/products/151007683-neverest-rki-5-professional-backdraft-damper-inline-spring-loaded) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-09-19*