---
product_id: 48535372
title: "Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair"
brand: "kair"
price: "฿1345"
currency: THB
in_stock: true
reviews_count: 13
category: "Kair"
url: https://www.desertcart.co.th/products/48535372-kair-straight-ducting-reducer-adaptor-sys-125-sys-100-ducvkc603
store_origin: TH
region: Thailand
---

# Lightweight 40.8g plastic build 125mm to 100mm precision fit Push-fit compatible design Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair

**Brand:** kair
**Price:** ฿1345
**Availability:** ✅ In Stock

## Summary

> 🔄 Upgrade your airflow with precision and ease!

## Quick Answers

- **What is this?** Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair by kair
- **How much does it cost?** ฿1345 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/48535372-kair-straight-ducting-reducer-adaptor-sys-125-sys-100-ducvkc603)

## 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

- • **Push-Fit Convenience:** Designed to fit over push-fit connectors ensuring quick, tool-free installation.
- • **Lightweight Durability:** Crafted from sturdy plastic weighing just 40.8g for easy handling and lasting performance.
- • **Multi-Application Ready:** Ideal for tumble dryers, extractor fans, hydroponics, and kitchen ventilation—upgrade your airflow game.
- • **Universal Compatibility:** Works flawlessly with Kair SYS-100 & SYS-125 ranges plus standard ducting systems.
- • **Seamless Size Transition:** Effortlessly converts 125mm ducting to 100mm for versatile ventilation setups.

## Overview

The Kair Straight Ducting Reducer/Adaptor DUCVKC603 is a lightweight, durable plastic fitting that converts 125mm ducting to 100mm. Compatible with Kair’s SYS-100 and SYS-125 ranges, it features a push-fit design for quick installation and is perfect for enhancing ventilation in dryers, extractor fans, and more.

## Description

Free delivery and returns on all eligible orders. Shop Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair.

Review: Good - Works great. I wanted to extend the exhaust tube from my tumble dryer. You’ll need an additional clip to fit. Fits the tube perfectly. Quality product.
Review: Brilliant fit - Quality products fitted perfectly reducing 6” kitchen extractor to 5” vent pipe. Price and delivery very good what’s not to like and why it’s not rated higher is beyond me .

## Features

- Adapter to convert 125mm to 100mm ducting - 5" to 4"
- On one side there is a 125mm female spigot. Fits over push-fit connectors (bends, etc.) Requires an additional 125mm plug to connect round 125mm pipe.
- On the other side there is a 100mm spigot. Fits in 100mm straight ducting
- Compatible with 100mm and 125mm ducting systems, including the extensive Kair SYS-100 and SYS-125 range of fittings, sockets and grilles.
- Perfectly suited for conducting your tumble dryer, bathroom or kitchen extractor fan, hydroponics, in-line fans or cooker hoods and other ventilation applications.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004X4S7QI |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 3,347 in DIY & Tools ( See Top 100 in DIY & Tools ) 7 in Ducting |
| Colour | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,595) |
| Date First Available | 19 April 2011 |
| Item Package Quantity | 1 |
| Item Weight | 40.8 g |
| Item model number | DUCVKC603 |
| Manufacturer | Kair |
| Material | Plastic |
| Number of Pieces | 1 |
| Part Number | DUCVKC603 |
| Plug profile | wall mount |
| Product Dimensions | 5.08 x 5.08 x 0.01 cm; 40.82 g |
| Shape | Rectangular |
| Size | 125mm to 100mm |

## Product Details

- **Brand:** Kair
- **Colour:** White
- **Connector type:** Coupling, Plug, Reducer
- **Item dimensions L x W x H:** 5.1 x 5.1 centimetres
- **Item weight:** 0.09 Pounds
- **Manufacturer:** Kair
- **Material:** Plastic
- **Number of pieces:** 1
- **Size:** 125mm to 100mm
- **Thread size:** 125mm, 100mm

## Images

![Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair - Image 1](https://m.media-amazon.com/images/I/415Hw3eWTlL.jpg)
![Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair - Image 2](https://m.media-amazon.com/images/I/613-NFUqxVL.jpg)
![Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair - Image 3](https://m.media-amazon.com/images/I/51fa6xd9vZL.jpg)
![Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair - Image 4](https://m.media-amazon.com/images/I/51KNqw4oMJL.jpg)
![Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair - Image 5](https://m.media-amazon.com/images/I/71t3r9eNHjL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this a one piece adaptor (150mm>100mm) or two pieces together (150mm>125mm then 125mm>100mm)?**
A: It was over a year ago, however from memory it was a one piece adapter which I used for an over the cooker extractor. Hope this is useful

**Q: New extractor fan 120mm outlet. Existing flexible hose 100mm. Anything needed besides this and clip?**
A: Not really. One end wedged onto my extractor fan and the other on the piping. I didn't have a clip so just used gaffa tape 😉

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by R***1 on 30 October 2025*

Works great. I wanted to extend the exhaust tube from my tumble dryer. You’ll need an additional clip to fit. Fits the tube perfectly. Quality product.

### ⭐⭐⭐⭐⭐ Brilliant fit
*by A***R on 27 October 2025*

Quality products fitted perfectly reducing 6” kitchen extractor to 5” vent pipe. Price and delivery very good what’s not to like and why it’s not rated higher is beyond me .

### ⭐⭐⭐⭐ Does not fit a 100mm outer pipe but good quality
*by A***R on 30 June 2024*

Crazy I know but I had a tumble dryer with an outlet of 100 mm and the smaller dryer needed to be 80mm so I ordered this to do the job trouble is it fitted the 80mm new dryer but obviously the 100 mm outer duct was 100mm so it didn’t fit we had to get a piece of plastic bigger and tape it up! My fault but it was good quality plastic

## Frequently Bought Together

- Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair
- 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.co.th/products/48535372-kair-straight-ducting-reducer-adaptor-sys-125-sys-100-ducvkc603](https://www.desertcart.co.th/products/48535372-kair-straight-ducting-reducer-adaptor-sys-125-sys-100-ducvkc603)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-25*