---
product_id: 242042704
title: "Repa Market 5\" to 4\" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods"
brand: "repa market"
price: "139.87 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Repa Market"
url: https://www.desertcart.tn/products/242042704-repa-market-5-to-4-inch-duct-reducer-increaser-galvanized
store_origin: TN
region: Tunisia
---

# Home/Office Use Sturdy Steel Easy Install Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods

**Brand:** repa market
**Price:** 139.87 DT
**Availability:** ✅ In Stock

## Summary

> 🔄 Transform Your Ducting Game!

## Quick Answers

- **What is this?** Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods by repa market
- **How much does it cost?** 139.87 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/242042704-repa-market-5-to-4-inch-duct-reducer-increaser-galvanized)

## 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

- • **DIY Friendly:** Ideal for both professional trades and home improvement enthusiasts.
- • **Compact Design:** Perfectly sized at 5.04 x 3.54 inches for easy integration.
- • **Robust Construction:** Crafted from galvanized steel for durability and longevity.
- • **Lightweight Yet Strong:** Weighs only 4.6 ounces, making installation a breeze.
- • **Versatile Compatibility:** Seamlessly connects various duct sizes for HVAC, fans, and more.

## Overview

The 5" to 4" Inch Duct Reducer Round Fitting Pipe Increaser is a versatile and durable solution for connecting different duct sizes in various applications, from HVAC systems to kitchen exhausts. Made from robust galvanized steel, this reducer is designed for easy installation and is perfect for both residential and commercial use.

## Description

Best Sellers Visit the Store Best Sellers Visit the Store Plastic Vent Covers Visit the Store Plastic Vent Covers Metal Vent Covers Visit the Store Metal Vent Covers Exhaust Covers Visit the Store Exhaust Covers Access Panels Visit the Store Access Panels Clamps and Tapes Visit the Store Clamps and Tapes Metal Ducting System Visit the Store Metal Ducting System Duct Connectors Visit the Store Duct Connectors Roof Vent Covers Visit the Store Roof Vent Covers Duct End Caps Visit the Store Duct End Caps Plastic Ducting System Visit the Store Plastic Ducting System Diffusers Visit the Store Diffusers Duct Silencers Visit the Store Duct Silencers

Review: Size matters - Great if you want to lose some inches. Size matters here
Review: Couldn't be any better. - So often dust collector fittings are too loose, or too tight, or too thin, or too whatever. In this case, the 6 to 5 adapter was perfect-- allowing me to connect my 6" DustDeputy port to a 5" hose without leaks. Furthermore, it is a seamless made from heavy guage metal so no bending or distorting. Well worth the extra couple of extra dollars compared to standard sheet metal fittings.

## Features

- PRECISE MEASUREMENTS – Male fit small end outer diameter: 3.89" Inches; Male fit widest end outer diameter: 4.88" Inches; Overall depth 3.54" Inches; Transition length in middle after connecting 1.34" Inches; fits solid or flexible ducting for HVAC dryer vents and exhaust fans.
- MATERIAL & DURABILITY – Heavy-duty galvanized steel resists rust, moisture, and corrosion; built to last for residential, commercial, and industrial ducting applications.
- FUNCTIONALITY & FEATURES – Works as a reducer or increaser; Male to Male fit; Ensures secure fit for ventilation fans, dryer ducts, and exhaust vent pipes while maintaining high airflow efficiency.
- INSTALLATION & USE – Simple push-fit installation for quick DIY or professional projects; compatible with flexible dryer vent hose, rigid duct pipe, and inline duct fans.
- APPLICATION & BENEFIT – Perfect for HVAC tools and projects, bathroom extractor fans, kitchen range hoods, tumble dryers, and ventilation systems in homes, garages, and workshops.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JVGFDJ3 |
| Best Sellers Rank | #107,459 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #176 in HVAC Ducting |
| Brand | Repa Market |
| Brand Name | Repa Market |
| Color | Silver |
| Connector Type | Reducer |
| Customer Reviews | 4.6 out of 5 stars 1,046 Reviews |
| Exterior Finish | Alloy Steel |
| Included Components | Galvanized Steel Reducer/Increaser |
| Item Dimensions | 5.04 x 3.54 x 5.04 inches |
| Item dimensions L x W x H | 5.04 x 3.54 x 5.04 inches |
| Manufacturer | Repa Market |
| Material | Metal |
| Material Type | Metal |
| Model Number | REPA-MARKET-XXXX |
| Number of Pieces | 1 |
| Size | 4 to 5 Inch / 100 to 125 mm |
| Thread Size | 1/2 inch |
| Thread Type | NPT |
| Unit Count | 1.0 Count |

## Product Details

- **Size:** 4 to 5 Inch / 100 to 125 mm
- **Material:** Metal
- **Brand:** Repa Market
- **Color:** Silver
- **Item dimensions L x W x H:** 5.04 x 3.54 x 5.04 inches
- **Connector Type:** Reducer
- **Thread Size:** 1/2 inch
- **Exterior Finish:** Zinc
- **Thread Type:** NPT
- **Number of Pieces:** 1

## Images

![Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods - Image 1](https://m.media-amazon.com/images/I/81xBqb6DV4L.jpg)
![Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods - Image 2](https://m.media-amazon.com/images/I/71S0nJNwx-L.jpg)
![Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods - Image 3](https://m.media-amazon.com/images/I/81TDxKDA4OL.jpg)
![Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods - Image 4](https://m.media-amazon.com/images/I/81w6YSILurL.jpg)
![Repa Market 5" to 4" Inch Duct Reducer/Increaser – Galvanized Steel Vent Pipe Adapter HVAC & Dryer Vent Systems – Round Metal Coupling Connector for Exhaust Fans, Bathroom Ventilation, Kitchen Hoods - Image 5](https://m.media-amazon.com/images/I/81XzMsqRdML.jpg)

## Available Options

This product comes in different **Material Type, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Size matters
*by D***N on December 19, 2025*

Great if you want to lose some inches. Size matters here

### ⭐⭐⭐⭐⭐ Couldn't be any better.
*by N***A on March 27, 2023*

So often dust collector fittings are too loose, or too tight, or too thin, or too whatever. In this case, the 6 to 5 adapter was perfect-- allowing me to connect my 6" DustDeputy port to a 5" hose without leaks. Furthermore, it is a seamless made from heavy guage metal so no bending or distorting. Well worth the extra couple of extra dollars compared to standard sheet metal fittings.

### ⭐⭐⭐⭐⭐ It works!
*by M***N on March 8, 2024*

I use this fitting for part of my dust collector with aluminum tape. It works great. it doesn’t fit on the dust collector but with the tape it’s a pretty solid connection.

## Frequently Bought Together

- 5" to 4" Inch Duct Reducer Round Fitting Pipe Increaser Made from Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal)
- Aluminum Foil Tape, 2 inch x 65 Feet (3.9 mil), Insulation Adhesive Metal High Temperature Heavy Duty HVAC Tape, Silver for Ductwork, Dryer Vent, HVAC
- 5 Inch Duct 5 Feet, Hon&Guan Flexible Dryer Vent Hose For Tight Space Dryer Exhaust Hose Aluminum Duct For Heating and Cooling Ventilation-with 2 Clamps

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**Shop now:** [https://www.desertcart.tn/products/242042704-repa-market-5-to-4-inch-duct-reducer-increaser-galvanized](https://www.desertcart.tn/products/242042704-repa-market-5-to-4-inch-duct-reducer-increaser-galvanized)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-12*