--- product_id: 175532851 title: "Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap" brand: "repa market" price: "$38.09" currency: USD in_stock: true category: "Repa Market" url: https://www.desertcart.us/products/175532851-repa-market-galvanized-steel-4-inch-duct-backdraft-damper-one store_origin: US region: United States of America --- # Fits 4-inch ducting with 3.89" neck Dual spring-loaded one-way airflow flaps Heavy-duty galvanized steel + aluminum blades Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap **Brand:** repa market **Price:** $38.09 **Availability:** ✅ In Stock ## Summary > 🚀 Seal the airflow, silence the noise, and upgrade your duct game! ## Quick Answers - **What is this?** Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap by repa market - **How much does it cost?** $38.09 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/175532851-repa-market-galvanized-steel-4-inch-duct-backdraft-damper-one) ## Best For - repa market enthusiasts ## Why This Product - Trusted repa market brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile HVAC Compatibility:** Perfect for dryers, kitchen vents, bathroom exhausts, and heating ducts, supporting both residential and commercial ventilation needs. - • **Ultimate Backdraft Prevention:** Dual spring-loaded flaps guarantee one-way airflow, blocking cold drafts, odors, and reverse airflows to maintain HVAC efficiency. - • **Effortless, Tool-Free Installation:** Simply insert into ducting—compatible with flexible or rigid pipes—making upgrades or replacements hassle-free and fast. - • **Built to Last with Premium Materials:** Constructed from galvanized steel and aluminum with noise-reducing foam seals for durability and whisper-quiet operation. - • **Precision Fit for Seamless Integration:** Engineered to snugly fit 4-inch ducts, ensuring airtight, leak-free performance that keeps your airflow optimized. ## Overview The Repa Market 4 Inch Galvanized Steel Backdraft Damper is a robust HVAC solution designed for 4-inch duct systems. Featuring heavy-duty galvanized steel construction with aluminum blades and noise-reducing foam seals, it ensures durable, quiet, and airtight one-way airflow control. Its dual spring-loaded flaps prevent backdrafts, cold air, and odors, enhancing system efficiency across dryer vents, kitchen exhausts, and heating ducts. Easy to install without tools, this damper fits flexible or rigid ducts, making it a versatile choice for both residential and commercial ventilation. ## Description Buy Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap: Ducting - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - FITS 4 INCH DUCTING SYSTEMS – MALE FIT NECK DIAMETER 3.89". TOTAL LENGHT 3.46". Precision-engineered for a tight internal fit inside metal ventilation pipes or ducts for reliable, airtight performance. - DURABLE CONSTRUCTION - ALUMINUM AND GALVANIZED STEEL DAMPER – 4 backdraft damper made from heavy-duty galvanized steel with aluminum blades and noise-reduction padding – built-in foam seal improves airtightness, reduces noise, and ensures smooth, quiet flap operation while preventing drafts and backflow.. Built to withstand high temperatures from -4°F up to 212°F, moisture, and continuous use in dryer vents, kitchen exhausts, HVAC ductwork, and heating systems. - AIR BACKDRAFT CONTROL – 4 inch backdraft damper features dual spring-loaded flaps that open only in the outflow direction, stopping reverse airflow, cold air, odors, and unwanted drafts while keeping HVAC duct systems efficient and quiet. Compatible with all round ducting systems, flexible or rigid, metal or plastic pipes, dryer vent systems. - EASY INSTALLATION – The backdraft damper is engineered for operation in a single airflow direction. Installing it in reverse will prevent proper function. Simple, tool-free installation—just insert the damper into the duct. For flexible ducts, secure with clamps for a tighter fit; for rigid ducts, use aluminum tape or mounting adhesive to ensure a stable connection (mounting accessories not included). Ideal for use in bathroom exhaust fans and kitchen ventilation systems. - WIDE HVAC APPLICATIONS – Designed as a backdraft shutter for air conditioners, dryers, cooker hoods, bathroom exhausts, inline ventilation fans as exhaust fan damper, range hoods, inline vent draft blocker and heating ducts. Works with rigid or flexible metal ducting and spiral pipe connectors, ensuring efficient backflow prevention in residential and commercial ventilation. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0822VQMHM | | Best Sellers Rank | #182,855 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #398 in HVAC Ducting | | Brand Name | Repa Market | | Color | Silver | | Customer Reviews | 4.4 4.4 out of 5 stars (1,010) | | Global Trade Identification Number | 07427046530293 | | Included Components | Backdraft Damper | | Item Dimensions L x W x Thickness | 4"L x 3.46"W x 4"Th | | Manufacturer | Repa Market | | Material Type | Galvanized Steel | | Number of Pieces | 1 | | Unit Count | 1 Count | ## Product Details - **Brand:** Repa Market - **Color:** Silver - **Material:** Galvanized Steel - **Product Dimensions:** 4"L x 3.46"W x 4"Th - **Unit Count:** 1 Count ## Images ![Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap - Image 1](https://m.media-amazon.com/images/I/71PnvUBtxOL.jpg) ![Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap - Image 2](https://m.media-amazon.com/images/I/61sxIhT8Q7L.jpg) ![Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap - Image 3](https://m.media-amazon.com/images/I/81hC96pXepL.jpg) ![Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap - Image 4](https://m.media-amazon.com/images/I/81BWbSWvu7L.jpg) ![Repa Market Galvanized Steel 4 Inch Duct Backdraft Damper - One-Way Airflow HVAC Damper, Dryer Vent Damper, Metal Inline Backdraft - 4 Inch Duct Damper, Dryer Duct Connector with Backdraught Flap - Image 5](https://m.media-amazon.com/images/I/81-Smn5RpHL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Draft Blocker 4'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap - EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm) - 4'' Inch Duct Splitter for Exhaust Fan Dryer Vent Hose 3 Way Duct Hose Connector, Y Shape, Y Joint Metal (4'' Inch, Y Shape) --- ## 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.us/products/175532851-repa-market-galvanized-steel-4-inch-duct-backdraft-damper-one](https://www.desertcart.us/products/175532851-repa-market-galvanized-steel-4-inch-duct-backdraft-damper-one) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-07*