---
product_id: 274276363
title: "4\" to 3\" Inch Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made from Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 4 to 3 Inch)"
brand: "repa market"
price: "€ 48.33"
currency: EUR
in_stock: true
reviews_count: 6
category: "Repa Market"
url: https://www.desertcart.hr/products/274276363-4-to-3-inch-duct-reducer-round-reducer-duct-fitting
store_origin: HR
region: Croatia
---

# 4" to 3" Inch Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made from Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 4 to 3 Inch)

**Brand:** repa market
**Price:** € 48.33
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 4" to 3" Inch Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made from Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 4 to 3 Inch) by repa market
- **How much does it cost?** € 48.33 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/274276363-4-to-3-inch-duct-reducer-round-reducer-duct-fitting)

## 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

## Description

With the current rapidly growing focus on quality of life and comfort requirements in residential and working premises, the importance of ventilation is more significant than ever. Even in the well designed and maintained building, a person can be uncomfortable if the system for air exchange is not working or is functioning incorrectly. In premises where the air is always fresh, people feel more active, relaxed, healthy, and have good appearance and capacity for work. Installation of a ventilation system is liable engineering and technical task. Our health depends upon the operation of ventilation system and its components. That is why the choice of ventilation equipment is primary for quality, reliability and environment friendly conditions. “Repa Market” is a young developing company which offers quality, reliable and functional products, interesting designer solutions, wide opportunities of choice and beneficial terms of cooperation. The strategic aim of Repa Market is to meet continuously growing consumer demand in quality products. The results of detailed marketing research underlie design and construction of various new developments. Quality materials, modern production equipment, the experience and knowledge of qualified specialists provide highly efficient, aesthetic, reliable and environmentally friendly products.

Review: good quality - all good
Review: Snug fit - Perfect fit for intended use

## Features

- 100MM TO 80MM REDUCER - Both ends are male fit, made to connect different size pipes. Largest opening diameter is 99mm, while the smallest connection diameter is 79mm. Galvanized steel round ducting adapter 100 mm to 80 mm.
- Can be used with HVAC systems, bathroom extractor fans, inline ventilators, cooker hoods, tumble dryers, hydroponics, kitchens or, anywhere else in the apartment, home or office space.
- Sturdy Steel ducting is perfect for DIY and Trade use.
- 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.
- Perfectly suited for ducting your Tumble Dryer, Bathroom or Any type of extractor fan, Hydroponics, In-Line Extract Fans, or Cooker Hood.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JVG4J85 |
| Brand | Repa Market |
| Brand Name | Repa Market |
| Color | Silver |
| Colour | Silver |
| Connector Type | Reducer |
| Connector type | Reducer |
| Customer Reviews | 4.5 out of 5 stars 180 Reviews |
| Exterior Finish | Alloy Steel |
| Included Components | Galvanized Steel Reducer/Increaser |
| Item Dimensions | 10.3 x 9.7 x 10.3 centimeters |
| Item dimensions L x W x H | 10.3 x 9.7 x 10.3 centimeters |
| Manufacturer | REPA MARKET |
| Material | Metal |
| Material Type | Metal |
| Model Number | [Repa Market model number not specified] |
| Number of Pieces | 1 |
| Size | 3 to 4 Inch / 80 to 100 mm |
| Thread Size | 4" to 3" Inch |
| Thread Type | NPT |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Repa Market
- **Color:** Silver
- **Connector Type:** Reducer
- **Exterior Finish:** Alloy Steel
- **Item dimensions L x W x H:** 4.06 x 3.82 x 4.06 inches
- **Material:** Metal
- **Number of Pieces:** 1
- **Size:** 3 to 4 Inch / 80 to 100 mm
- **Thread Size:** 100 mm
- **Thread Type:** NPT

## Images

![4" to 3" Inch Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer Made from Galvanized Steel (Drain, Waste and Vent) Reducing Coupling (Metal, 4 to 3 Inch) - Image 1](https://m.media-amazon.com/images/I/81xBqb6DV4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ good quality
*by P***1 on 3 February 2021*

all good

### ⭐⭐⭐⭐⭐ Snug fit
*by P***Y on 23 January 2026*

Perfect fit for intended use

### ⭐⭐⭐⭐⭐ quality reducer for exhaust use
*by J***. on 15 June 2024*

This thing is decently constructed, easy to work with and priced fairly. I used it to neck up from 3" to 4" ducting, reducing pressure in my bathroom exhaust system. Which allowed the pipe clamps to retain the ducting better. Would buy again.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.hr/products/274276363-4-to-3-inch-duct-reducer-round-reducer-duct-fitting](https://www.desertcart.hr/products/274276363-4-to-3-inch-duct-reducer-round-reducer-duct-fitting)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-09-23*