---
product_id: 348481566
title: "4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector"
brand: "kikerike"
price: "707339₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Kikerike"
url: https://www.desertcart.vn/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one
store_origin: VN
region: Vietnam
---

# Easy push-in installation One-way airflow backdraft prevention Galvanized steel & aluminum build 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector

**Brand:** kikerike
**Price:** 707339₫
**Availability:** ✅ In Stock

## Summary

> 🌬️ Seal the deal on comfort—stop drafts before they start!

## 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 by kikerike
- **How much does it cost?** 707339₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/348481566-4-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

- • **Effortless Installation:** Simply push into any 4-inch ventilation pipe for a secure, no-fuss fit—perfect for pros and DIYers alike.
- • **Energy Efficiency Booster:** Stops unwanted air recirculation, helping maintain your ideal indoor climate and reduce utility bills.
- • **Optimized Airflow Control:** Spring-loaded flap design guarantees smooth one-way airflow, preventing energy-wasting backdrafts.
- • **Durable Metal Construction:** Galvanized steel frame with aluminum flaps ensures long-lasting performance and rust resistance.
- • **Versatile HVAC Compatibility:** Ideal for ACs, exhaust fans, range hoods, heating ducts, and more across residential and commercial spaces.

## Overview

The 4 Inch Draft Blocker Backdraft Damper is a robust HVAC accessory crafted from galvanized steel and aluminum, designed to prevent backflow and improve ventilation efficiency. Easy to install in standard 4-inch ducts, it fits a wide range of applications including ACs, exhaust fans, and heating systems. Its spring-loaded flap ensures one-way airflow, reducing energy loss and enhancing indoor comfort.

## Description

Buy 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector: Draft Stoppers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: I can’t believe it worked so well - Each time the A/C or furnace kicked on it would draw outside air in through the vent hood. Cold in the winter and hot in the summer. The temperature under the hood was significant and very noticeable. So I installed this draft blocker in the pipe in the attic, separating the pipe at a joint inserting the valve and reconnecting the pipes. I seal the joints with aluminum tape. The draft blocker has a weather strip inside sealing it when not in use. I did have to reseal the pipe where it passed through the roof with roof tar to restore the water seal. It works great, the is no back draft now when the A/C is running and made a huge difference. I would recommend and buy again.
Review: Happy with this product it does what they say it does. - These work great for what I need them for. They open and close a few times a day and have been working that way for about seven months now. Simple to install not much else to say.

## Features

- 【Material】The 4 inch backdraft damper is made of a Galvanized steel, 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 |
|---------------|-------|
| ASIN | B099KGNZRL |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #3,885 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in HVAC Ducting |
| Color | Sliver |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,067) |
| Date First Available | July 15, 2021 |
| Item Package Quantity | 1 |
| Item Weight | 4.2 ounces |
| Manufacturer | Kikerike |
| Package Dimensions | 5.43 x 5 x 3.78 inches |
| Size | 4 Inch |

## Images

![4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Image 1](https://m.media-amazon.com/images/I/614fF1RgQ7L.jpg)

## Questions & Answers

**Q: Can this be used to stop my Hot water tank from blowing out the flame on windy days?**
A: sorry, I did not use it for the flame from  HWT.

**Q: can this be used on a dryer vent or will the foam seal melt?**
A: I would say the dryer heat could damage or maybe even melt the seal. Maybe you could try removing the gasket and wrap a strip of fiberglass in it’s place.

**Q: Would this help keep out bugs?**
A: Yes it creates a barrier and only opens one way from the inside of house

**Q: Would this fit between two sections of standard, 4 inch semi-rigid ducting? Looking to add to bathroom vent fan ductwork.**
A: Yes, that's exactly how you would use it. Make sure to buy the correct HVAC aluminum (metallic) duct tape for the connection. A clamp cannot be used bc the crushing pressure would inhibit the flapper from working properly.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I can’t believe it worked so well
*by D***N on November 22, 2025*

Each time the A/C or furnace kicked on it would draw outside air in through the vent hood. Cold in the winter and hot in the summer. The temperature under the hood was significant and very noticeable. So I installed this draft blocker in the pipe in the attic, separating the pipe at a joint inserting the valve and reconnecting the pipes. I seal the joints with aluminum tape. The draft blocker has a weather strip inside sealing it when not in use. I did have to reseal the pipe where it passed through the roof with roof tar to restore the water seal. It works great, the is no back draft now when the A/C is running and made a huge difference. I would recommend and buy again.

### ⭐⭐⭐⭐⭐ Happy with this product it does what they say it does.
*by A***R on October 4, 2025*

These work great for what I need them for. They open and close a few times a day and have been working that way for about seven months now. Simple to install not much else to say.

### ⭐⭐⭐⭐⭐ Great product
*by J***P on November 16, 2025*

Works well and looks nice. Quality product

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.vn/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one](https://www.desertcart.vn/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-20*