---
product_id: 622268440
title: "4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black"
brand: "kikerike"
price: "HK$224"
currency: HKD
in_stock: true
reviews_count: 8
url: https://www.desertcart.hk/products/622268440-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one
store_origin: HK
region: Hong Kong
---

# One-way airflow backdraft prevention Spring-loaded flap for optimal sealing 4-inch galvanized steel build 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black

**Brand:** kikerike
**Price:** HK$224
**Availability:** ✅ In Stock

## Summary

> 🌬️ Seal the deal on fresh airflow—no more backdraft blues!

## Quick Answers

- **What is this?** 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black by kikerike
- **How much does it cost?** HK$224 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/622268440-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one)

## Best For

- kikerike enthusiasts

## Why This Product

- Trusted kikerike brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Airflow Control:** Prevents unwanted backflow and recirculation, enhancing your HVAC efficiency and indoor air quality.
- • **Versatile Compatibility:** Perfect for ACs, exhaust fans, range hoods, heating ducts, and more—ideal for residential, commercial, and industrial setups.
- • **Compact & Lightweight Design:** At just 4.6 ounces and 4 inches in size, it fits seamlessly without adding bulk or complexity.
- • **Effortless Push-In Installation:** Simply insert into your ventilation pipe for a secure fit—spring orientation guarantees smooth open/close action every time.
- • **Durable Galvanized Steel & Aluminum:** Robust powder-coated steel frame with lightweight aluminum flaps ensures long-lasting performance and corrosion resistance.

## Overview

The 4 Inch Draft Blocker Backdraft Damper by Kikerike is a premium ventilation accessory crafted from galvanized steel with aluminum flaps. Designed for easy push-in installation, it features a spring-loaded flap that ensures one-way airflow, preventing backdrafts and improving HVAC efficiency. Suitable for a wide range of residential and commercial ducting applications, this compact, powder-coated damper offers durable, corrosion-resistant performance without the hassle.

## Description

Full description not available

## Features

- 【Material】The 4 inch backdraft damper is made of a Galvanized steel with powder coat, the flap leaves are made of aluminum
- 【Installation】The backdraft damper is installed by pushing it into the ventilation pipe as far as it will go. The position of the spring should be horizontal when the flap is installed horizontally so that it can be opened and closed optimally. This also applies to the vertical installation
- 【Function】This airflow regulating backdraft shutter fits over the TD lip and is designed to improve ventilation by preventing air from re-circulating when the fans are not in use
- 【Wide Application】 These backdraft dampers can be widely used in ACs, exhaust fans, extractors, range hoods, heating ducts, vents and other residential, commercial and industrial applications
- 【Note】Back draught valves can be inserted into ventilation ducts which are flexible or non flexible. Cannot be used with plastic ducts as the sizes are different. All dimensions are measured manually, please allow 1-3mm differences

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Kikerike |
| Part Number | DB-4in-black |
| Item Weight | 4.6 ounces |
| Package Dimensions | 4.96 x 4.41 x 3.7 inches |
| Size | 4 Inch |
| Color | Black |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Color:** Black
- **Brand:** Kikerike
- **Maximum Gap Fill:** 4 Inches
- **Manufacturer:** Kikerike

## Images

![4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black - Image 1](https://m.media-amazon.com/images/I/71-FhjSEMeL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great buy
*by B***E on March 7, 2025*

This damper worked perfectly to solved my problem. It is quiet and installation was simple

### ⭐⭐⭐⭐⭐ Ventahood backdraft preventer
*by E***K on March 10, 2025*

Just what i needed. Fit and worked great.

### ⭐⭐⭐⭐ Installation
*by T***H on February 2, 2024*

The flaps would rub against the bottom of the damper. I wrapped a paper clip around the bottom part of the rod to make a washer and cut off the excess. This raised the flaps high enough so they no longer rubbed. The damper must be installed with the flaps oriented vertically (like a door). When connecting the damper to the duct work, the crimped end off the existing duct will not fit into the damper so the crimp needs to be cut off and the damper will slide into the duct. When installing a sheet metal screw, there's no issue on the supply side but on the exhaust side the screw must be either at top dead center or bottom dead center so it will not interfere with the flaps opening. Once installed, the damper worked great and stopped the cold outside air from entering the stove exhaust.

## Frequently Bought Together

- 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
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**Shop now:** [https://www.desertcart.hk/products/622268440-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one](https://www.desertcart.hk/products/622268440-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-06*