---
product_id: 208505038
title: "Repa Market 6\" 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: "€ 49.59"
currency: EUR
in_stock: true
reviews_count: 13
category: "Repa Market"
url: https://www.desertcart.de/products/208505038-repa-market-6-to-4-inch-duct-reducer-increaser-galvanized
store_origin: DE
region: Germany
---

# High airflow efficiency: reducer & increaser combo Precision fit: 3.89" to 5.86" diameter Galvanized steel: rust & corrosion resistant Repa Market 6" 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:** € 49.59
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your airflow game with precision and durability!

## Quick Answers

- **What is this?** Repa Market 6" 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?** € 49.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/208505038-repa-market-6-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

- • **Built to Last:** Heavy-duty galvanized steel resists rust, moisture, and wear
- • **Optimized Airflow:** Maintains maximum ventilation efficiency without leaks
- • **Effortless Installation:** Push-fit design for quick DIY or pro HVAC projects
- • **Versatile Compatibility:** Works with flexible and rigid ducts, exhaust fans, and dryer vents
- • **Seamless Size Transition:** Perfectly engineered 6" to 4" fit for airtight connections

## Overview

The Repa Market 6" to 4" Duct Reducer/Increaser is a galvanized steel vent pipe adapter designed for HVAC, dryer vents, and exhaust systems. It offers a precise fit with a 3.89" to 5.86" diameter range, ensuring secure, leak-free connections. Built from heavy-duty galvanized steel, it resists rust and corrosion, making it ideal for residential, commercial, and industrial use. Its push-fit installation simplifies setup, while its versatile design supports both flexible and rigid ducting, optimizing airflow efficiency across ventilation applications.

## Description

Repa Market 6" 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 - desertcart.com

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 – Small end outer diameter: 3.89" Inches; Widest end outer diameter: 5.86" Inches; Overall depth 4.33" Inches; Transition length in middle after connecting 1.93" 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; 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 | B089NKL35L |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #76,402 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #112 in HVAC Ducting |
| Brand | Repa Market |
| Connector Type | Reducer |
| Customer Reviews | 4.6 4.6 out of 5 stars (990) |
| Date First Available | June 4, 2020 |
| Exterior Finish | Alloy Steel |
| Finish | Galvanized Steel |
| Included Components | Galvanized Steel Reducer/Increaser |
| Item Package Quantity | 1 |
| Item Weight | 7.4 ounces |
| Item dimensions L x W x H | 6.02 x 4.33 x 6.02 inches |
| Manufacturer | Repa Market |
| Material | Metal |
| Number of Pieces | 1 |
| Product Dimensions | 6.02 x 4.33 x 6.02 inches |
| Shape | Circular |
| Size | 4 to 6 Inch / 100 to 150 mm |
| Special Features | Easy to Install |
| Style | Reducer/Increaser |
| Thread Size | 6 inches |
| Thread Type | NPT |
| Usage | Commercial/Residential |

## Product Details

- **Brand:** Repa Market
- **Connector Type:** Reducer
- **Exterior Finish:** Alloy Steel
- **Item dimensions L x W x H:** 6.02 x 4.33 x 6.02 inches
- **Manufacturer:** Repa Market
- **Material:** Metal
- **Number of Pieces:** 1
- **Size:** 4 to 6 Inch / 100 to 150 mm
- **Thread Size:** 6 inches
- **Thread Type:** NPT

## Images

![Repa Market 6" 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/81oTKzTRG3L.jpg)
![Repa Market 6" 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/71-uMQpkL6L.jpg)
![Repa Market 6" 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/81w6YSILurL.jpg)
![Repa Market 6" 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/81TDxKDA4OL.jpg)
![Repa Market 6" 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.

### ⭐⭐⭐⭐ Heavy
*by M***K on January 4, 2025*

Was looking for a 12 in reducer for hvac. And this was about all I have been able to find to date. It is nice but heavy for the use I needed so will possibly have to add some extra support for it.

## Frequently Bought Together

- Galvanized Steel 6 to 4 Inch Duct Reducer - Round Duct Fitting Pipe Increaser - Reducing Coupling
- EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm)
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust

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**Shop now:** [https://www.desertcart.de/products/208505038-repa-market-6-to-4-inch-duct-reducer-increaser-galvanized](https://www.desertcart.de/products/208505038-repa-market-6-to-4-inch-duct-reducer-increaser-galvanized)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-16*