---
product_id: 362875100
title: "Vent Systems 100 mm / 4\" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC"
brand: "vent systems"
price: "€ 19.28"
currency: EUR
in_stock: true
reviews_count: 12
category: "Vent Systems"
url: https://www.desertcart.pt/products/362875100-vent-systems-100-mm-4-inch-air-vent-duct-connector
store_origin: PT
region: Portugal
---

# Fits 125 mm standard ducts Built-in gravity shutter valve Durable UV-resistant plastic Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC

**Brand:** vent systems
**Price:** € 19.28
**Availability:** ✅ In Stock

## Summary

> 🌬️ Elevate your airflow game with smart, sleek ventilation!

## Quick Answers

- **What is this?** Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC by vent systems
- **How much does it cost?** € 19.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/362875100-vent-systems-100-mm-4-inch-air-vent-duct-connector)

## Best For

- vent systems enthusiasts

## Why This Product

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

## Key Features

- • **Rugged & Weatherproof:** Crafted from UV-resistant plastic that withstands heat, cold, and humidity without cracking or warping.
- • **Smart Airflow Control:** Integrated gravity flap blocks unwanted drafts, odors, and insects while maintaining smooth ventilation.
- • **Effortless DIY Installation:** Pre-drilled holes allow quick, secure mounting with just four screws—no pro tools or skills needed.
- • **Seamless 125 mm Compatibility:** Perfectly engineered for all standard 5" ventilation pipes and extractor fans, ensuring airtight HVAC connections.
- • **Versatile Ventilation Upgrade:** Ideal for kitchens, bathrooms, AC vents, and extractor fans to boost airflow and energy efficiency.

## Overview

The Vent Systems 125 mm Air Vent Duct Connector Flange is a durable, UV-resistant plastic ventilation accessory designed for standard 5" ducts. Featuring a built-in gravity shutter valve, it prevents unwanted airflow and pests while ensuring smooth ventilation. Easy to install with pre-drilled holes, it’s perfect for enhancing HVAC, kitchen, and bathroom ventilation systems with reliable, airtight connections.

## Description

Product Description

Review: Fantastic product - This is a key part if your are venting your air conditioner hose through a wall vent attachment. I bought two other parts which would be ideal if sold as a kit. And that was the threaded attachment a standard blank plate to add additional support. I was used in my home as an attachment to a kydex panel fitted over the window. Highly recommended if you have a push open window so you have 4 flat edges of the window to attach Velcro no hot air coming back in at all. First time ever.
Review: Very good - Come very quickly good quality

## Features

- MALE FIT CONNECTOR FOR 100 MM / 4 INCH DUCTING – Designed with 99 mm / 3.90 inch diameter for all standard 100 mm / 4 inch round ventilation pipes and HVAC ducts. Provides a precise and secure fit for reliable airflow.
- STRONG PLASTIC BUILD – Made from durable, UV-resistant plastic for long-lasting use. Performs reliably in heat, cold, and humid environments without cracking or warping.
- BUILT-IN SHUTTER FUNCTION – Integrated gravity flap prevents unwanted airflow, odours, and insects while maintaining smooth ventilation performance indoors or outdoors.
- QUICK DIY INSTALLATION – Pre-drilled holes ensure easy wall or ceiling mounting. Fits securely with just four screws. No professional tools or skills required. (SCREWS AND CLAMPS NOT INCLUDED)
- IDEAL FOR MULTIPLE VENTILATION USES – Perfect for bathrooms, kitchens, extractor fans, and air conditioning vents. Improves airflow and energy efficiency throughout your home.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08GY38QP5 |
| Best Sellers Rank | 15,777 in DIY & Tools ( See Top 100 in DIY & Tools ) 38 in Ducting |
| Brand | Vent Systems |
| Colour | White |
| Connector Type | Flange |
| Connector type | Flange |
| Country of Origin | Latvia |
| Customer Reviews | 4.4 out of 5 stars 260 Reviews |
| Exterior Finish | ABS |
| Included Components | None. |
| Item Dimensions | 15 x 15 x 6.2 centimetres |
| Item Weight | 0.08 Kilograms |
| Item dimensions L x W x H | 15 x 15 x 6.2 centimetres |
| Manufacturer | Vent Systems |
| Material | Plastic |
| Model Number | LS-AFV100 |
| Number of Pieces | 1 |
| Part Number | LS-AFV100 |
| Size | 100 mm |
| Thread Size | 1 inch |
| Thread Type | UN |
| Unit Count | 1.0 count |

## Product Details

- **Size:** 125 mm / 4.94" - with shutter
- **Material:** Plastic
- **Brand:** Vent Systems
- **Colour:** White
- **Item dimensions L x W x H:** 17 x 17 x 6 centimetres
- **Connector type:** Flange
- **Thread size:** 5 inch
- **Exterior finish:** ABS
- **Thread type:** Metric Tapered
- **Item weight:** 0.1 Kilograms

## Images

![Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC - Image 1](https://m.media-amazon.com/images/I/51pRAA22FWL.jpg)
![Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC - Image 2](https://m.media-amazon.com/images/I/61W42N6pvFL.jpg)
![Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC - Image 3](https://m.media-amazon.com/images/I/61-1QSyV6mL.jpg)
![Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC - Image 4](https://m.media-amazon.com/images/I/7173zf79pUL.jpg)
![Vent Systems 100 mm / 4" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC - Image 5](https://m.media-amazon.com/images/I/71Ar7usyOaL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic product
*by M***S on 27 May 2026*

This is a key part if your are venting your air conditioner hose through a wall vent attachment. I bought two other parts which would be ideal if sold as a kit. And that was the threaded attachment a standard blank plate to add additional support. I was used in my home as an attachment to a kydex panel fitted over the window. Highly recommended if you have a push open window so you have 4 flat edges of the window to attach Velcro no hot air coming back in at all. First time ever.

### ⭐⭐⭐⭐⭐ Very good
*by A***R on 16 January 2026*

Come very quickly good quality

### ⭐⭐⭐⭐ Happy
*by K***J on 18 September 2025*

Accurate size (not always the case with vent and ducting products). Is a little noisy but I’ve sorted that with a thin line of silicone where the flap contacts the body

## Frequently Bought Together

- Vent Systems 125 mm / 5" Inch - Air Vent Duct Connector Flange - Plastic Ventilation Pipe with Valve - Ducting Connector for Round Flexible or Straight Pipes, Ventilation System HVAC
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**Shop now:** [https://www.desertcart.pt/products/362875100-vent-systems-100-mm-4-inch-air-vent-duct-connector](https://www.desertcart.pt/products/362875100-vent-systems-100-mm-4-inch-air-vent-duct-connector)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-06-07*