---
product_id: 463102123
title: "6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap"
brand: "repa market"
price: "$101.57"
currency: USD
in_stock: true
reviews_count: 8
category: "Repa Market"
url: https://www.desertcart.ec/products/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper
store_origin: EC
region: Ecuador
---

# Fits Ø6 inch (150mm) ducts precisely Foam seal for quieter operation Spring-loaded one-way airflow flap 6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap

**Brand:** repa market
**Price:** $101.57
**Availability:** ✅ In Stock

## Summary

> 🚫💨 Stop drafts, save energy, and enjoy peace & quiet!

## Quick Answers

- **What is this?** 6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap by repa market
- **How much does it cost?** $101.57 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/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper)

## 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

- • **Noise-Reducing Design:** Internal foam seal minimizes operational noise, creating a quieter, more comfortable environment.
- • **Universal Compatibility:** Works flawlessly with metal, flexible aluminum, plastic, or fabric ducts for versatile HVAC applications.
- • **Smart One-Way Airflow Control:** Spring-loaded backdraft flap allows air outflow only, preventing unwanted backflow and drafts.
- • **Precision Fit for Seamless Integration:** Engineered to snugly fit 6-inch round ducts ensuring airtight performance and no energy loss.
- • **Effortless Installation & Retrofit Ready:** Insert-and-go design fits inside ducts without modifications, perfect for upgrades in homes or offices.

## Overview

This 6-inch (150mm) aluminum backdraft damper is a precision-engineered ventilation accessory designed to fit snugly inside round ducts. Featuring a spring-loaded one-way flap with an internal foam seal, it prevents backflow and drafts while reducing noise. Compatible with various duct materials, it installs easily for HVAC systems in homes, offices, and industrial spaces, enhancing airflow control and energy efficiency.

## Description

Great prices on your favourite Home brands, and free delivery on eligible orders.

Review: Good quality - Very good quality
Review: Working well so far - It's only been installed for a couple of weeks but seems to be working well. It replaces a plastic flap that was hinged on one side and always banged noisily when there were high winds outside. This one has passed that test and seems to have reduced the backdrafts we were getting.

## Features

- DIMENSIONS: Fits Ø6 Inch (150mm) round ducts; Insertion diameter: 5.86 inch (149mm). Total width: 3.46 Inch (88mm). Precision-engineered for a tight internal fit inside metal ventilation pipes for reliable, airtight performance.
- Damper has back pressure valve which is equipped with a spring-loaded split flap closure and allows airflow in one direction only, designed for use in air conditioners (AC), dryers, exhaust, extractor or range hoods, heating ducts, vents and other HVAC applications for kitchen, bathroom and other desired installation locations.
- INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installations so that it can open and close optimally. The Backdraft shutter is installed so that the damper blades open only in the outflowing air direction.
- Back draft damper is made for insertion into various ventilation ducts which are flexible or non flexible / Installation in home, bathroom, kitchen, warehouse, industrial, office or any other areas where backflow needs to be regulated. Fits with all types of round ducts: sheet metal, flexible aluminum, plastic or fabric. The backflow damper opens and closes automatically. The flap is suitable for retrofitting, since it is completely inside the duct.
- The aluminum closing vanes open when overpressure occurs and close with the help of a spring when the pressure drops. To reduce operating noise, the pressure relief valve is equipped with an internal foam seal, which provides better sealing and quieter operation of the valve.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B083M613K3 |
| Best Sellers Rank | 19,490 in DIY & Tools ( See Top 100 in DIY & Tools ) 52 in Ducting |
| Brand | Repa Market |
| Brand Name | Repa Market |
| Colour | Silver |
| Country Of Origin | Latvia |
| Customer Reviews | 4.5 out of 5 stars 948 Reviews |
| Global Trade Identification Number | 07427046530231 |
| Included Components | Backdraft Damper |
| Item Dimensions L x W x Thickness | 15L x 15W x 15Th centimetres |
| Manufacturer | Repa Market |
| Material | Aluminium |
| Material Type | Aluminium |
| Maximum Gap Fill | 6 Inches |
| Maximum gap fill | 6 Inches |
| Number of pieces | 1 |
| Product dimensions | 15L x 15W x 15Th centimetres |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Repa Market
- **Colour:** Silver
- **Material:** Aluminium
- **Maximum gap fill:** 6 Inches
- **Product dimensions:** 15L x 15W x 15Th centimetres

## Images

![6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap - Image 1](https://m.media-amazon.com/images/I/711K9GJ6xQL.jpg)
![6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap - Image 2](https://m.media-amazon.com/images/I/618ctN27AFL.jpg)
![6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap - Image 3](https://m.media-amazon.com/images/I/81hC96pXepL.jpg)
![6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap - Image 4](https://m.media-amazon.com/images/I/81BWbSWvu7L.jpg)
![6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality
*by A***A on 5 December 2025*

Very good quality

### ⭐⭐⭐⭐⭐ Working well so far
*by C***G on 14 February 2025*

It's only been installed for a couple of weeks but seems to be working well. It replaces a plastic flap that was hinged on one side and always banged noisily when there were high winds outside. This one has passed that test and seems to have reduced the backdrafts we were getting.

### ⭐⭐⭐⭐⭐ Brilliant
*by A***N on 21 July 2025*

Brilliant. Replaced the cheap plastic type with this and now the flaps don’t bang when it’s windy.

## Frequently Bought Together

- 6 Inch / 150 mm Draft Blocker - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap
- WeCooper 100mm - 4 inch Connector with Backdraught Shutter, Non-Return Damper Flap to Connect Duct Pipe or Flexible Hose Pipe
- Kair Round Connector 100mm - 4 inch to Connect Duct Pipe or Flexible Ducting Hose

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**Shop now:** [https://www.desertcart.ec/products/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper](https://www.desertcart.ec/products/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-21*