--- product_id: 411231093 title: "Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair" brand: "kair" price: "178.73 DT" currency: TND in_stock: true reviews_count: 5 category: "Kair" url: https://www.desertcart.tn/products/411231093-kair-straight-125mm-to-100mm-ducting-reducer-adaptor-sys-125 store_origin: TN region: Tunisia --- # 125mm to 100mm precision fit Versatile HVAC & ventilation use UK-made durable plastic build Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair **Brand:** kair **Price:** 178.73 DT **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your airflow game with precision and ease! ## Quick Answers - **What is this?** Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair by kair - **How much does it cost?** 178.73 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/411231093-kair-straight-125mm-to-100mm-ducting-reducer-adaptor-sys-125) ## 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 - • **Multi-Application Ready:** Ideal for tumble dryers, extractor fans, hydroponics, cooker hoods, and whole-house ventilation. - • **Universal Compatibility:** Works flawlessly with Kair SYS-100 & SYS-125 ranges plus flexible and rigid ducting types. - • **Premium UK Craftsmanship:** Manufactured with high-quality polystyrene/polypropylene ensuring durability and reliability. - • **Seamless Size Transition:** Effortlessly adapts 125mm ducts to 100mm systems for perfect airflow integration. - • **Quick & Easy Installation:** Push-fit female spigot and male spigot design reduces installation time and complexity. ## Overview The Kair Straight 125mm to 100mm Ducting Reducer/Adaptor (DUCVKC603) is a UK-made, high-quality plastic connector designed to seamlessly convert 125mm ducting to 100mm. Compatible with Kair’s extensive SYS-100 and SYS-125 ducting systems, it supports both rigid and flexible ducts, making it perfect for HVAC, extractor fans, tumble dryers, and more. Engineered for durability and easy installation, it ensures efficient airflow and reliable ventilation performance. ## Description Kair 125mm Female to 100mm Male Round Ducting Adaptor. Made in the UK using high-quality white Polystyrene/Polypropylene plastic Material. Max / Min Temperature: +60c / -15c; On one side there is a 125mm Female Spigot - Will fit over male fittings (bends etc). Rigid round 125mm ducting pipe (Part: DUCVKC267) will require a male connector / coupling (Part: DUCVKC355). 127mm Flexible ducting (Part: DUCP0092/127/35) will fit over and require tape or metal hose clips (Part: DUCVKC611) to seal. ;On the other side there is a 100mm male spigot - will fit into 100mm straight ducting (part: DUCVKC250). 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 (Part: DUCVKC264). 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. ;Genuine Kair Product & covered by the Kair 100% Satisfaction Guarantee for your peace of mind. Made in the UK. Compatible with the extensive Kair SYS-100 & SYS-125 range of fittings, outlets, and grilles. Search for Kair SYS-100 Ducting for the full range of Kair 100mm Round and 110mm x 54mm Rectangular Ducting Products. Search for Kair SYS-125 for the full range of Kair Rectangular 150mm x 70mm and 125mm Round ducting products. Review: perfetto e funzionale - il riduttore è un pezzo molto semplice ma trovarlo in giro diventa complicato i negozi non lo tengono e tanto meno le ferramente, qui è diventato tutto semplice e si adatta perfettamente ai tubi da ridurre Review: La disponibilité - On avait pas ce produit en quincaillerie. J avais acheté une hotte et oh non!! Les normes ont changées. La solution était de repercer un mur de 1.5 m en briques ( des heures de travail😣) au dernier moment j ai penser à desertcart et 8.00€ et 1 jour plus tard ma hotte est poser et en état de fonctionnement.😥 ## 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 | | Best Sellers Rank | #38,336 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #65 in Heating & Cooling Ducting Products | | Brand | Kair | | Brand Name | Kair | | Color | White | | Colour | White | | Connector Type | Reducer | | Connector type | Reducer | | Customer Reviews | 4.5 out of 5 stars 2,534 Reviews | | Item Dimensions | 5.1 x 5.1 centimeters | | Item Weight | 0.09 Pounds | | Item dimensions L x W x H | 5.1 x 5.1 centimeters | | Manufacturer | Kair | | Manufacturer Part Number | DUCVKC603 | | Material | Plastic | | Material Type | Plastic | | Model Number | DUCVKC603 | | Number of Pieces | 1 | | Size | Klein | | Thread Size | 125mm, 100mm | | Unit Count | 1 Count | ## Product Details - **Brand:** Kair - **Colour:** White - **Item dimensions L x W x H:** 5.1 x 5.1 centimeters - **Material:** Plastic - **Size:** Klein ## Images ![Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair - Image 1](https://m.media-amazon.com/images/I/415Hw3eWTlL.jpg) ![Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair - Image 2](https://m.media-amazon.com/images/I/613-NFUqxVL.jpg) ![Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair - Image 3](https://m.media-amazon.com/images/I/51fa6xd9vZL.jpg) ![Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair - Image 4](https://m.media-amazon.com/images/I/51KNqw4oMJL.jpg) ![Kair Straight 125mm to 100mm Ducting Reducer/Adaptor - SYS-125 / SYS-100 - DUCVKC603 by Kair - Image 5](https://m.media-amazon.com/images/I/71t3r9eNHjL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ perfetto e funzionale *by B***O on 10 May 2016* il riduttore è un pezzo molto semplice ma trovarlo in giro diventa complicato i negozi non lo tengono e tanto meno le ferramente, qui è diventato tutto semplice e si adatta perfettamente ai tubi da ridurre ### ⭐⭐⭐⭐⭐ La disponibilité *by D***A on 12 June 2018* On avait pas ce produit en quincaillerie. J avais acheté une hotte et oh non!! Les normes ont changées. La solution était de repercer un mur de 1.5 m en briques ( des heures de travail😣) au dernier moment j ai penser à Amazon et 8.00€ et 1 jour plus tard ma hotte est poser et en état de fonctionnement.😥 ### ⭐⭐⭐⭐⭐ Hole reducer! *by A***L on 29 May 2026* Fitted perfectly. Thank you. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/411231093-kair-straight-125mm-to-100mm-ducting-reducer-adaptor-sys-125](https://www.desertcart.tn/products/411231093-kair-straight-125mm-to-100mm-ducting-reducer-adaptor-sys-125) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-05*