---
product_id: 51940328
title: "Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units"
brand: "kair"
price: "€ 26.95"
currency: EUR
in_stock: true
reviews_count: 13
category: "Kair"
url: https://www.desertcart.hr/products/51940328-ducting-reducer-150mm-to-125mm-6-to-5-inch-duct
store_origin: HR
region: Croatia
---

# 150mm to 125mm precision fit Universal compatibility with Kair SYS-125 & SYS-150 Durable ABS plastic build Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units

**Brand:** kair
**Price:** € 26.95
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your airflow game with precision and style!

## Quick Answers

- **What is this?** Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units by kair
- **How much does it cost?** € 26.95 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/51940328-ducting-reducer-150mm-to-125mm-6-to-5-inch-duct)

## Best For

- kair enthusiasts

## Why This Product

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

## Key Features

- • **Robust ABS Construction:** Engineered from high-quality ABS plastic for long-lasting durability and reliability.
- • **Plug & Play Installation:** Simple, secure fitting with female and male spigots ensures quick setup without hassle.
- • **Seamless Size Transition:** Effortlessly converts 6-inch to 5-inch ducting for versatile ventilation setups.
- • **Wide System Compatibility:** Perfectly pairs with Kair’s extensive SYS-125 & SYS-150 ducting ranges for a flawless fit.
- • **Optimized Airflow Efficiency:** Designed to maintain optimal airflow between different duct sizes, reducing noise and resistance.

## Overview

The Kair Ducting Reducer 150mm to 125mm is a high-quality ABS plastic connector designed to seamlessly reduce duct pipe sizes from 6 to 5 inches. Compatible with Kair’s SYS-125 and SYS-150 systems, it ensures efficient airflow for extract fans, ventilation units, and household appliances like tumble dryers and kitchen hoods. Lightweight and easy to install, it’s a must-have for professional-grade ventilation solutions.

## Description

Product Description Kair Round Ducting Connectors Duct Pipe Reduction Connectors. Kair Ducting Reducer Suitable for use with domestic ventilation systems. Can be used with rigid plastic ducting systems - seal with mastic or tape Can be used with flexible ducting systems with use of metal hose clips Max / Min Temperature: +60c / -15c. Kair plastic rigid ducting is perfect for DIY and trade use. Perfectly suited for ducting your Tumble Dryer, Bathroom or Kitchen extractor fan, Hydroponics, In-Line Extract Fans, or Cooker Hood. This reducer can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive stack vent, positive input, air conditioning, HVAC, and Heat Recovery Systems. Kair Ducting Reducers 100mm to 80mm 100mm 100mm (4 inch) male spigot. Will fit into 100mm straight ducting. 80mm On the other side there is a 80mm male spigot. Will fit into 80mm female fittings or flexible ducting. 110mm to 100mm 110mm Female spigot. Will fit over 110mm straight ducting pipe or soil pipe. 100mm Compatible with 110mm and 100mm ducting systems including the extensive Kair range of fittings, outlets, and grilles. 125mm to 100mm 125mm Female spigot will fill fit over male fittings. Round 125mm ducting pipe Part: DUCVKC267 will require a male connector Part: DUCVKC355. 127mm Flexible ducting Part: DUCP0092/127/35 will fit over. Male Spigot will fit into 100mm straight ducting Part: DUCVKC250. 150mm to 100mm 150mm Round 150mm ducting pipe Part: DUCVKC670 will require a male connector Part: DUCVKC365. Kair 152mm Flexible Hose Part: DUCP0092/152/35 will fit over the socket. 150mm to 125mm Male and will fit inside Kair 125mm straight ducting Part: DUCVKC267 without the need for a connector. 200mm to 150mm 200mm Female spigot will fit over male fittings (bends, connectors, etc). 150mm / 6 inch Side Male spigot - Will fit into straight ducting such as Kair 150mm rigid pipe Part: DUCVKC670 or 152mm Flexible Hose Part: DUCP0092/152/35. Kair Ducting & Ventilation Range Ducting Reducers are part of the Kair ducting and ventilation range. Unlike generic imported products Kair products are made in the UK and are compatible with the extensive range of fittings outlets and grilles in multiple sizes to offer your a complete solution for all of your ventilation needs. This item can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive stack vent, positive input ventilation, air conditioning, HVAC, and Heat Recovery systems. Plastic rigid ducting is perfect for DIY and Trade use and provides superior airflow performance and durability versus flexible duct.

Review: Hole reducer! - Fitted perfectly. Thank you.
Review: Great product - Great product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Kair |
| Colour | White |
| Connector type | Coupling , Reducer |
| Item dimensions L x W x H | 15.5 x 15.5 x 6 centimetres |
| Material | ABS Plastic |
| Size | 150mm to 125mm |

## Product Details

- **Brand:** Kair
- **Colour:** White
- **Connector type:** Coupling, Reducer
- **Item dimensions L x W x H:** 15.5 x 15.5 x 6 centimetres
- **Item weight:** 0.09 Pounds
- **Material:** ABS Plastic
- **Number of pieces:** 1
- **Size:** 150mm to 125mm
- **Thread size:** 150mm, 125mm
- **Thread type:** UN

## Images

![Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units - Image 1](https://m.media-amazon.com/images/I/417xz6wvZyL.jpg)
![Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units - Image 2](https://m.media-amazon.com/images/I/61L8yZwVyxL.jpg)
![Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units - Image 3](https://m.media-amazon.com/images/I/51fDNXbE8lL.jpg)
![Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units - Image 4](https://m.media-amazon.com/images/I/51RugVmfzFL.jpg)
![Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units - Image 5](https://m.media-amazon.com/images/I/71ImahiDgNL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can you tell me the length please?**
A: The length / height is 70mm

**Q: how do i stick this to my air con? its 125mm connector on the air con but the window and pipe is 150mm and threaded, but cant find a threaded version!**
A: I don’t see anything in the Kair range that solves your problem. The 150 -125mm reducer is just slip-on and it worked fine in my situation. Does the Air-con manufacturer have a fixing to take you from thread to smooth or technical department you can approach for advice? If all else fails You could try to make a connector from flexible hose and fasten with glue and large jubilee clips. Sorry I can’t be more help.

**Q: How is this fixed to the other pipe? Does it need a jubilee clip and if so, is it sufficent to fix it in place?**
A: This is more designed to reduce the size of the fitting on a fan and isn't designed to put two pipes together.

 With that in mind, to make it work for that, both of your pipes would need to be an adequate size to fit over both sizes of the reducer and a jubilee clip would suffice to hold it in place.

**Q: My bathroom extractor fan is 100mm but the ducting is 110mm. This reducer seems to be the ideal solution to remove the gap - is it?**
A: It is, although this is designed to fit ducting so you may need a short sleeve of 100mm ducting between the reducer and your fan.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Hole reducer!
*by A***L on 29 May 2026*

Fitted perfectly. Thank you.

### ⭐⭐⭐⭐⭐ Great product
*by P***E on 15 April 2026*

Great product

### ⭐⭐⭐⭐ Solid and Practical Ducting Adapter
*by R***N on 3 June 2026*

This Kair ducting reducer does exactly what it is designed to do and fits well within a ventilation setup. The 100mm to 80mm reduction is accurate and makes it easy to connect different sized ducting or extract fans without hassle. The plastic feels reasonably sturdy and the fitting is tight enough to prevent air leaks once installed properly. It integrates well into existing ducting systems and provides a secure connection when clamped. Installation is straightforward and it slots into place without needing any modifications. For DIY ventilation projects, it is a simple and effective solution that saves time and effort. The only reason for four stars instead of five is that the plastic feels slightly lightweight, so care is needed during installation to avoid stressing the joints, but once fitted it performs well. Overall, a reliable ducting connector that does its job effectively and is good value for ventilation or extraction setups.

## Frequently Bought Together

- Kair Ducting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units
- Kair PVC Flexible Hose 125mm - 5 inch Universal Tumble Drier, Cooker Hood, Extractor Fan, Air Conditioner Hose - 3 Metre Length
- 125mm Pack of 2 Adjustable 120-140mm Stainless Steel Pipe Clamp Secure Hose Clip Inline Duct Extractor Fan Cooker Hood

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**Shop now:** [https://www.desertcart.hr/products/51940328-ducting-reducer-150mm-to-125mm-6-to-5-inch-duct](https://www.desertcart.hr/products/51940328-ducting-reducer-150mm-to-125mm-6-to-5-inch-duct)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-17*