---
product_id: 175532851
title: "Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation"
brand: "repa market"
price: "€ 29.32"
currency: EUR
in_stock: true
reviews_count: 13
category: "Repa Market"
url: https://www.desertcart.it/products/175532851-repa-market-4-inch-backdraft-damper-galvanized-steel-draft-blocker
store_origin: IT
region: Italy
---

# Fits Ø4 inch ducts precisely Spring-loaded one-way airflow Durable galvanized steel build Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation

**Brand:** repa market
**Price:** € 29.32
**Availability:** ✅ In Stock

## Summary

> 🌀 Stop drafts, start comfort — your HVAC’s new best friend!

## Quick Answers

- **What is this?** Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation by repa market
- **How much does it cost?** € 29.32 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/175532851-repa-market-4-inch-backdraft-damper-galvanized-steel-draft-blocker)

## 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

- • **Universal HVAC Compatibility:** Perfect for dryers, range hoods, exhaust fans, and more—upgrade any ventilation system with confidence.
- • **Quick & Versatile Installation:** Insert easily into metal ducts horizontally or vertically—no fuss, no extra tools required.
- • **Effortless One-Way Airflow Control:** Dual spring-loaded flaps automatically block reverse drafts, keeping your space cozy and odor-free.
- • **Built to Last with Industrial Strength:** Heavy-duty galvanized steel resists heat, moisture, and wear for reliable, long-term performance.
- • **Precision Fit for Seamless Integration:** Engineered to snugly fit 4-inch round ducts, ensuring airtight, leak-free ventilation.

## Overview

The Repa Market 4 Inch Backdraft Damper is a galvanized steel, spring-loaded inline vent stopper designed to fit 4-inch round ducts. It prevents reverse airflow, cold drafts, and odors with dual flaps that open only outward, ensuring efficient and quiet ventilation. Built for durability and easy installation, it suits a wide range of HVAC applications including dryers, exhaust fans, and kitchen hoods.

## Description

Buy Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation: 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: Good buy - Worked great. As described.

## Features

- DIMENSIONS – Fits into Ø4 Inch round ducts; Insertion neck diameter: 3.89 inch. Total width: 3.46 Inch. Precision-engineered for a tight internal fit inside metal ventilation pipes for reliable, airtight performance.
- AUTOMATIC BACKDRAFT CONTROL – 4 Inch inline draft stopper 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.
- DURABLE GALVANIZED STEEL – Heavy-duty galvanized steel backflow damper with smooth spring action and foam seal prevents rattling and air leakage. Built to withstand high temperatures, moisture, and continuous use in dryer vents, kitchen exhausts, HVAC ductwork, and heating systems.
- EASY INSTALLATION – Simply insert the draft blocker into round ducting until the stop edge; fits Ø4 Inch metal ventilation pipes for a secure seal. Can be installed horizontally or vertically. Horizontal setups require the spring to be positioned sideways for optimal one-way airflow in your duct system.
- WIDE HVAC APPLICATIONS – Designed as a backdraft shutter for air conditioners, dryers, cooker hoods, bathroom exhausts, inline ventilation fans, range hoods, 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 |
| Batteries required | No |
| Best Sellers Rank | #131,786 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #253 in HVAC Ducting |
| Brand | Repa Market |
| Color | Silver |
| Customer Reviews | 4.4 4.4 out of 5 stars (985) |
| Finish types | Galvanized |
| Global Trade Identification Number | 07427046530293 |
| Included Components | Backdraft Damper |
| Item Weight | 4.6 ounces |
| Manufacturer | REPA MARKET |
| Material | Galvanized Steel |
| Number of Pieces | 1 |
| Product Dimensions | 4"L x 3.46"W x 4"Th |
| Specific instructions for use | Commercial/Residential |

## Product Details

- **Brand:** Repa Market
- **Color:** Silver
- **Material:** Galvanized Steel
- **Number of Pieces:** 1
- **Product Dimensions:** 4"L x 3.46"W x 4"Th

## Images

![Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation - Image 1](https://m.media-amazon.com/images/I/71PnvUBtxOL.jpg)
![Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation - Image 2](https://m.media-amazon.com/images/I/61sxIhT8Q7L.jpg)
![Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation - Image 3](https://m.media-amazon.com/images/I/81hC96pXepL.jpg)
![Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation - Image 4](https://m.media-amazon.com/images/I/81BWbSWvu7L.jpg)
![Repa Market 4 Inch Backdraft Damper – Galvanized Steel Draft Blocker/One-Way Airflow Vent Stopper/HVAC Exhaust Dryer Duct Connector – Inline Spring-Loaded Backflow Preventer for Secure Ventilation - Image 5](https://m.media-amazon.com/images/I/81-Smn5RpHL.jpg)

## Available Options

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

## 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

### ⭐⭐⭐⭐⭐ Good buy
*by A***R on June 20, 2025*

Worked great. As described.

### ⭐⭐⭐⭐ Good product
*by M***R on June 13, 2020*

The product is good but the spring has a higher than expected tension. Had to rework the spring to ease the tension to allow 110 CFM fan to open flaps fully. Installed real easy into existing metal sleeve.

## 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)

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**Shop now:** [https://www.desertcart.it/products/175532851-repa-market-4-inch-backdraft-damper-galvanized-steel-draft-blocker](https://www.desertcart.it/products/175532851-repa-market-4-inch-backdraft-damper-galvanized-steel-draft-blocker)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-17*