---
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: "₨524"
currency: SCR
in_stock: true
reviews_count: 13
category: "Repa Market"
url: https://www.desertcart.sc/products/175532851-repa-market-galvanized-steel-4-inch-duct-backdraft-damper-one
store_origin: SC
region: Seychelles
---

# Fits 4-inch ducting with 3.89" neck Dual spring-loaded one-way airflow flaps Durable 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:** ₨524
**Availability:** ✅ In Stock

## Summary

> 🌪️ Stop drafts in their tracks — airflow, but only your way!

## 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?** ₨524 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/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

- • **Built to Last Under Pressure:** Heavy-duty galvanized steel frame with aluminum blades and noise-reducing foam seal for quiet, durable operation even in high-temp environments (-4°F to 212°F).
- • **Ultimate Backdraft Prevention:** Dual spring-loaded flaps allow airflow only outward, blocking cold drafts, odors, and reverse airflow to keep your HVAC system efficient and fresh.
- • **Effortless, Tool-Free Installation:** Simply insert into ducting—compatible with flexible or rigid ducts; secure with clamps or tape for a rock-solid fit without hassle.
- • **Versatile HVAC & Ventilation Solution:** Perfect for dryer vents, kitchen hoods, bathroom exhausts, and heating ducts—trusted by homeowners and pros alike for reliable airflow control.
- • **Precision Fit for Seamless Integration:** Engineered to snugly fit 4-inch duct systems, ensuring airtight, leak-free performance that pros demand.

## Overview

The Repa Market 4 Inch Galvanized Steel Backdraft Damper is a precision-engineered HVAC accessory designed to fit standard 4-inch duct systems. Constructed from heavy-duty galvanized steel with aluminum blades and a noise-reducing foam seal, it ensures durable, quiet operation across a wide temperature range. Featuring dual spring-loaded flaps, it allows one-way airflow to prevent backdrafts, cold air intrusion, and odors. Easy to install without tools, it’s ideal for dryer vents, kitchen exhausts, bathroom fans, and heating ducts, making it a versatile solution for both residential and commercial ventilation needs.

## 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

Review: Worked good for our hood fan - Hooked up inline with our hood fan above our stove, prevented back draft of cold air in the winter season. Easy install
Review: Great product - Exactly what I needed. I had to make a spring a little bit more flexible, good thing you can adjust it

## 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 | #179,187 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #395 in HVAC Ducting |
| Brand | Repa Market |
| Brand Name | Repa Market |
| Color | Silver |
| Customer Reviews | 4.4 out of 5 stars 1,013 Reviews |
| 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 | Galvanized Steel |
| Material Type | Galvanized Steel |
| Number of Pieces | 1 |
| Product Dimensions | 4"L x 3.46"W x 4"Th |
| 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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked good for our hood fan
*by J***. on December 23, 2025*

Hooked up inline with our hood fan above our stove, prevented back draft of cold air in the winter season. Easy install

### ⭐⭐⭐⭐⭐ Great product
*by E***. on August 8, 2026*

Exactly what I needed. I had to make a spring a little bit more flexible, good thing you can adjust it

### ⭐⭐⭐⭐ Works but spring is weak
*by J***H on January 4, 2024*

This damper works, but the spring is very weak. If you tip it anywhere past horizontal the doors fall open, so it can only be installed with the doors facing up or horizontally. Additionally if the doors open all the way to the center, the springs are not strong enough to push them closed again. I haven't run into an issue with this yet, but just noticed during the installation and will need to check at some point to make sure they are not stuck open.

## 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
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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-09-29*