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!

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.

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?

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.

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?

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.

Desertcart Logo

Deliver to Malaysia

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🔧 Upgrade your airflow game with precision and style!

LIGHTWEIGHT COMPACT - At just 40.8g and 15.5cm size, it’s easy to install without bulk or hassle.
ROBUST ABS CONSTRUCTION - Engineered from high-quality ABS plastic for long-lasting durability and resistance.
UNIVERSAL COMPATIBILITY - Works flawlessly with Kair SYS-125 & SYS-150 ranges plus standard ducting setups.
SEAMLESS SIZE TRANSITION - Effortlessly adapts 6-inch ducts to 5-inch systems for perfect airflow.
VERSATILE VENTILATION SOLUTION - Ideal for tumble dryers, extractor fans, hydroponics, and kitchen ventilation needs.

The KairDucting Reducer is a lightweight, durable ABS plastic connector designed to convert 150mm (6 inch) ducting to 125mm (5 inch) ducting. Compatible with a wide range of ventilation systems including Kair’s SYS-125 & SYS-150 fittings, it ensures seamless integration for extract fans, tumble dryers, kitchen hoods, and more, delivering efficient airflow and easy installation.

Reviews

B**S

Good quality product

Very compact and good quality. Fits snug just as it should so confirms that the product was quality due to being true to size.

12.09.2025

G**G

Perfect

Works between to convert extraction fan to standard size

26.07.2025

M**2

Perfect

Just what I needed. Other stores only have adapters from 100 to 125 then another from 125 to 150 so this just makes things easier for me. This did the job and seems good quality and fit snugly.

11.11.2022

O**.

Good quality plastic

Fit well, robust while installing

22.08.2025

S**E

It fits

Bought a small tumbler dryer and needed a connector for the new small hose to the extractor in the wall already there.This fits perfectly and feels solid. Excellent 👍

30.07.2025

G**D

Does not always match the common duct sizes

Check dimensions before purchase

29.07.2025

M**E

Vent reducer fitted

Not a lot to say. It turned up on time, it fitted. Happy days.

16.09.2025

K**G

Good!

Exacting what I needed

10.09.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

RM118

Duties & taxes incl.

Malaysiastore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Manufacturer	Kair
Part Number	DUCVKC619
Product Dimensions	15.49 x 15.49 x 5.99 cm; 40.82 g
Manufacturer reference	DUCVKC619
Size	150mm to 125mm (6 to 5 inch)
Colour	White
Material	ABS Plastic
Number of Pieces	1
Batteries included?	No
Batteries Required?	No
Item Weight	40.8 g

KairDucting Reducer 150mm to 125mm - 6 to 5 inch Duct Pipe Reduction Connector for Extract Fans and Ventilation Units

Details

Description

Specifications

Have a Question? See What Others Asked

Reviews

Common Questions