---
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: "RM224"
currency: MYR
in_stock: true
reviews_count: 8
category: "Repa Market"
url: https://www.desertcart.com.my/products/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper
store_origin: MY
region: Malaysia
---

# Fits Ø6 inch ducts precisely One-way spring-loaded flap Foam seal for quiet operation 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:** RM224
**Availability:** ✅ In Stock

## Summary

> 🚫💨 Stop drafts, start comfort — the silent guardian of your airflow!

## 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?** RM224 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/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

- • **Whisper-Quiet Operation:** Internal foam seal minimizes noise, eliminating the annoying clatter of traditional dampers during high winds.
- • **Smart One-Way Airflow Control:** Spring-loaded split flap allows air outflow only, preventing backdrafts and unwanted odors from invading your space.
- • **Precision Fit for Seamless Integration:** Engineered to snugly fit 6-inch (150mm) round ducts, ensuring airtight performance without leaks.
- • **Universal Compatibility & Easy Installation:** Works flawlessly with metal, flexible, aluminum, plastic, or fabric ducts—retrofit-ready for any HVAC setup.
- • **Durable Aluminum Build for Long-Term Reliability:** Galvanized aluminum construction resists corrosion and wear, perfect for both residential and commercial use.

## Overview

This 6-inch (150mm) backdraft damper is a precision-engineered aluminum device designed to fit snugly inside round ventilation ducts. Featuring a spring-loaded one-way flap with an internal foam seal, it prevents backflow and reduces noise, making it ideal for HVAC systems in homes and commercial spaces. Easy to install and compatible with various duct materials, it ensures efficient, quiet airflow control and long-lasting durability.

## 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.com.my/products/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper](https://www.desertcart.com.my/products/463102123-6-inch-150-mm-draft-blocker-backdraft-damper-draft-stopper)

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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-02-21*