---
product_id: 61616740
title: "Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose"
brand: "kair"
price: "104 zł"
currency: PLN
in_stock: true
reviews_count: 8
url: https://www.desertcart.pl/products/61616740-kair-round-connector-125mm-5-inch-to-connect-duct-pipe
store_origin: PL
region: Poland
---

# 125mm precision fit Universal duct compatibility Lightweight durable polystyrene Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose

**Brand:** kair
**Price:** 104 zł
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with confidence—your ducting’s missing link!

## Quick Answers

- **What is this?** Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose by kair
- **How much does it cost?** 104 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/61616740-kair-round-connector-125mm-5-inch-to-connect-duct-pipe)

## 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

- • **Lightweight Yet Durable:** Crafted from robust polystyrene, it’s easy to handle and built to last without adding bulk to your setup.
- • **Universal Compatibility:** Effortlessly joins any female 125mm plastic duct parts, including the entire Kair ducting range—no adapters needed.
- • **Streamlined Installation:** Male spigot design simplifies assembly, reducing installation time and ensuring a secure, leak-free connection.
- • **Seamless 125mm Connection:** Engineered for a perfect fit with standard 125mm pipes and 127mm flexible hoses, ensuring airtight duct runs.
- • **Versatile Ventilation Solution:** Ideal for tumble dryers, extractor fans, hydroponics, and kitchen ventilation—one connector, endless applications.

## Overview

The Kair Round Connector 125mm is a lightweight, durable polystyrene ducting accessory designed to seamlessly join 125mm rigid pipes or 127mm flexible hoses. Compatible with the full Kair duct range, it’s perfect for enhancing airflow in tumble dryers, extractor fans, hydroponics, and kitchen ventilation systems, delivering a secure and efficient duct run every time.

## Description

Full description not available

## Features

- 125mm / 5 inch plastic ducting connector with male spigot.
- Will fit inside 125mm round pipe or 127mm flexible hose and can be used to join multiple lengths of pipe together to form a long duct run.
- Will join any female part of the 125mm plastic duct range including the Kair ducting range.
- Perfectly suited for ducting your Tumble Dryer, Bathroom or Kitchen extractor fan, Hydroponics, In-Line Extract Fans, or Cooker Hood and other ventilation applications.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Kair |
| Part Number | DUCVKC355 |
| Product Dimensions | 12.7 x 12.7 x 6.2 cm; 50 g |
| Manufacturer reference | DUCVKC355 |
| Size | 125mm |
| Colour | White |
| Material | Polystyrene |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 50 g |

## Images

![Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose - Image 1](https://m.media-amazon.com/images/I/418U1-dVesL.jpg)
![Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose - Image 2](https://m.media-amazon.com/images/I/51aSzm8ItfL.jpg)
![Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose - Image 3](https://m.media-amazon.com/images/I/51m+27B9boL.jpg)
![Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose - Image 4](https://m.media-amazon.com/images/I/51istIAm3HL.jpg)
![Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose - Image 5](https://m.media-amazon.com/images/I/51qXuJ5W17L.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be placed horizontal , above a ceiling extractor fan , like the ones we have over the kitchen extractor hood over the hob??**
A: This particular backdraft shutter can be installed vertically or horizontally as the flap has a non return, meaning it will only open up one way just take care to install it the right way round

**Q: What makes the spigot close, I don't see any springs?  I use a sprung butterfly type and the spring is not strong enough which is why I'asking, thanks**
A: It relays on gravity mine dose the job I rate it 5 *

**Q: My years old solid duct pipe through a wall is 4" (102mm) od, with an id of 98mm. this connector clearly won't fit, is there another solution?**
A: This connector is designed to join two sections of vent pipe hence the raised section which locates between the two pipe ends•
To fit this unit into a single pipe as in a normal bathroom vent fan it is necessary to remove the raised portion of the annular ring to reduce the diameter• i used a file and it fitted perfectly, silicon sealant can be used to fix the location within the tube.
The tube has to be concentric otherwise the unit will be crushed and will not operate.

**Q: On a bathroom fan extractor assembly through a loft is it necessary to tape up the joints and if so, what's the best tape to use?**
A: If your joining the tube to extraction fan and oven extraction i used a cable tie. I have not joined flexi tube to tube but if i had i would have used duck tape.hope this helps Dave

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Perfectly
*by M***N on 31 March 2025*

Taped this to the back of my bathroom fan. I had to remove the raised centre via filing it off to fit into a 110mm pipe. Works perfectly.

### ⭐⭐⭐⭐ Works fine but needed small modification to prevent it sticking open in my installation
*by H***G on 6 September 2024*

I installed this in a vertical duct above my cooker hood. I was getting cold draughts coming in during the winter and this completely solved that problem.There was one small issue in that when mounted vertically it is possible for the flap to open more than 90 deg, tip past the vertical and then stick in the open position. I added a small screw to prevent it opening more than about 85 deg and this seemed to fix that issue.

### ⭐⭐⭐⭐⭐ Fit for purpose, with some modification.
*by B***N on 26 January 2025*

Bought this to retro fit in the ducting of a 12v Manrose bathroom fan which, for some reason and unlike its predecessor, came without a backdraft shutter.As other buyers have mentioned, its a tight fit in 100mm ducting and I had to trim the outer central ridge on the shutter to fit it inside the ducting. Used a very sharp paperhangers knife to shave a millimetre or so from the ridge and it now fits perfectly, held in place, just in case, by a blob or two of silicone. Its working well so far: yes, it clatters when the wind blows but that goes with the territory when, as we do, you live in a windy coastal town. Not sure how long it'll last given the wear that the wind will place on the shutter's basic hinges, but Time will tell.Very easy to retro fit if you have the access, so recommended.

## Frequently Bought Together

- Kair Round Connector 125mm - 5 inch to Connect Duct Pipe or Flexible Ducting Hose
- Kair PVC Flexible Hose 125mm - 5 inch Universal Tumble Drier, Cooker Hood, Extractor Fan, Air Conditioner Hose - 3 Metre Length
- Kair Straight Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 125 mm to 100 mm Kair

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-31*