---
product_id: 319646672
title: "100 mm / 4\" Inch Air Vent Duct Connector Flange - Plastic Ventilation Pipe - Ducting Connector for Round Flexible or Straight Pipes, Cooling Heating Ventilation System HVAC"
brand: "vent systems"
price: "€ 22.70"
currency: EUR
in_stock: true
reviews_count: 13
category: "Vent Systems"
url: https://www.desertcart.pt/products/319646672-100-mm-4-inch-air-vent-duct-connector-flange-plastic
store_origin: PT
region: Portugal
---

# Fits 4" HVAC pipes 4-screw secure mount ABS plastic durability 100 mm / 4" Inch Air Vent Duct Connector Flange - Plastic Ventilation Pipe - Ducting Connector for Round Flexible or Straight Pipes, Cooling Heating Ventilation System HVAC

**Brand:** vent systems
**Price:** € 22.70
**Availability:** ✅ In Stock

## Summary

> 🔄 Connect with Confidence — The Ultimate 4" Vent Duct Solution

## Quick Answers

- **What is this?** 100 mm / 4" Inch Air Vent Duct Connector Flange - Plastic Ventilation Pipe - Ducting Connector for Round Flexible or Straight Pipes, Cooling Heating Ventilation System HVAC by vent systems
- **How much does it cost?** € 22.70 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/319646672-100-mm-4-inch-air-vent-duct-connector-flange-plastic)

## 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

- • **Temperature Toughness:** Operates flawlessly between 41°F and 140°F for year-round comfort.
- • **Effortless Installation:** Pre-drilled holes and 4 screws make mounting quick and hassle-free.
- • **Precision Fit for 4" Pipes:** Seamlessly connects round flexible or straight ventilation ducts.
- • **Versatile HVAC Compatibility:** Ideal for extractor fans, kitchen hoods, bathroom vents, and more.
- • **Built to Last with ABS Plastic:** Engineered for durability and reliability in any HVAC setup.

## Overview

The Vent Systems 100 mm (4") Air Vent Duct Connector Flange is a robust ABS plastic component designed for easy, secure connection of round HVAC pipes. Perfect for both DIY enthusiasts and professionals, it features a 3.93" outer diameter, pre-drilled mounting holes, and supports a wide temperature range, making it an essential upgrade for efficient heating, cooling, and ventilation systems.

## Description

Shop Vent Systems 100 mm / 4" Inch Air Vent Duct Connector Flange - Plastic Ventilation Pipe - Ducting Connector for Round Flexible or Straight Pipes, Cooling Heating Ventilation System HVAC. Free delivery on eligible orders of £20 or more.

Review: Worked Well and Did the Job - The 6" Inch Air Vent Duct Connector Flange worked well for what I used it for. It fitted properly, was easy to install, and connected the ducting securely. Nothing complicated, but it does exactly what it’s meant to do. Good quality and no issues during fitting. Overall, a straightforward, reliable part that does the job as expected.
Review: Very good - Come very quickly good quality

## Features

- The duct connector is crafted from ABS plastic, ensuring durability and reliability. It is perfect for both DIY projects and professional trade applications. This connector simplifies linking or extending two-round vents, offering a practical and efficient solution for your ventilation needs.
- Easily fits any 4" plastic HVAC pipes with a straightforward installation using only 4 screwing points; the outer diameter of the flange is 3.93" Inches / 100 mm.
- Features pre-drilled holes for secure mounting on walls, ceilings, or other surfaces. Setup requires only two round vents, four screws for mounting to attach the vent to the connector.
- Perfectly suited for connecting extractor fans, bathroom fans, kitchen exhaust fans, in-line extract fans, cooker hoods, and various indoor or outdoor heating and cooling pipes. Ideal for HVAC applications including heating, cooling, or air conditioning systems in bathrooms, kitchens, and living rooms.
- Ideal for home and office upgrades, Vent Systems products combine portability with quality and exceptional durability, functioning optimally within a temperature range of 41 °F to 140 °F.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08GWS5G1H |
| Assembled Diameter | 3.93 Inches |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 23,936 in DIY & Tools ( See Top 100 in DIY & Tools ) 76 in Ducting |
| Colour | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,056) |
| Cutting Diameter | 3.93 Inches |
| Date First Available | 28 Aug. 2020 |
| Installation method | Wall Mounted |
| Item Package Quantity | 1 |
| Item Weight | 70 g |
| Item model number | 4751037230019 |
| Manufacturer | Vent Systems |
| Material | Plastic |
| Number of Pieces | 1 |
| Part Number | 4751037230019 |
| Shape | Square |
| Size | 4 pouces |

## Product Details

- **Brand:** Vent Systems
- **Colour:** White
- **Connector type:** Flange
- **Exterior finish:** ABS
- **Item dimensions L x W x H:** 15 x 15 x 6.2 centimetres
- **Material:** Plastic
- **Number of pieces:** 1
- **Size:** 4 pouces
- **Thread size:** 4 inch
- **Thread type:** UN

## Images

![100 mm / 4" Inch Air Vent Duct Connector Flange - Plastic Ventilation Pipe - Ducting Connector for Round Flexible or Straight Pipes, Cooling Heating Ventilation System HVAC - Image 1](https://m.media-amazon.com/images/I/41i65x8KMkL.jpg)

## Questions & Answers

**Q: my pipe in the wall is metal with a flange and wondering if this will hook up to it?**
A: inside diameter 3 3/4 outside 3 7/8

**Q: Does this have an inside flap similar to this model...https://www.amazon.com/Vent-Systems-Connector-Straight-Ventilation/dp/B08GY38QP5/ref=sr_1_3?cri**
A: No, there's no inside flap.

**Q: What is the diameter of the square?**
A: 6x6

**Q: What is the outer dimension of the flange?**
A: 6 inch square plate

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked Well and Did the Job
*by T***W on 3 January 2026*

The 6" Inch Air Vent Duct Connector Flange worked well for what I used it for. It fitted properly, was easy to install, and connected the ducting securely. Nothing complicated, but it does exactly what it’s meant to do. Good quality and no issues during fitting. Overall, a straightforward, reliable part that does the job as expected.

### ⭐⭐⭐⭐⭐ 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 4" inch Air Vent Duct Connector Flange Straight Ventilation Pipe Plastic Ducting Connector Plate for Cooling Heating Ventilation System HVAC 4" inch - Pack of (1)
- EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm)
- Dryer Vent Hose, 4'' Insulated Flexible Duct 16FT with 2 Duct Clamps, Heavy-Duty Three Layer Protection for HVAC Ventilation, Duct Fan Systems

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**Shop now:** [https://www.desertcart.pt/products/319646672-100-mm-4-inch-air-vent-duct-connector-flange-plastic](https://www.desertcart.pt/products/319646672-100-mm-4-inch-air-vent-duct-connector-flange-plastic)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-05*