--- product_id: 360660240 title: "Vent Systems 125 to 100 mm / 5\" to 4\" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe" brand: "vent systems" price: "€ 26.51" currency: EUR in_stock: true reviews_count: 7 url: https://www.desertcart.gr/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch store_origin: GR region: Greece --- # Home & office use Adaptable sizes Durable ABS plastic Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe **Brand:** vent systems **Price:** € 26.51 **Availability:** ✅ In Stock ## Summary > 🔧 Connect with Confidence! ## Quick Answers - **What is this?** Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe by vent systems - **How much does it cost?** € 26.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch) ## Best For - vent systems enthusiasts ## Why This Product - Trusted vent systems brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **DIY Friendly:** Perfect for both amateur and professional installations, making it a must-have. - • **Lightweight Design:** Weighs only 45.4g, ensuring easy handling and installation. - • **Robust Construction:** Crafted from high-quality ABS plastic for long-lasting durability. - • **Seamless Adaptability:** Easily connects 5" to 4" duct sizes for versatile applications. - • **Universal Compatibility:** Fits a variety of HVAC systems, fans, and appliances effortlessly. ## Overview The Vent Systems Duct Reducer Adapter is a versatile and durable solution for connecting various duct sizes in HVAC systems, crafted from high-quality ABS plastic. Ideal for both residential and commercial use, it seamlessly adapts from 5" to 4" sizes, making it perfect for a range of applications including bathroom fans, hydroponics, and more. ## Features - Adaptable Ducting Cone 128 mm / 5.04" (female fit) to 100 mm / 3.94" (male fit): Perfect for connecting ductwork to equipment like bathroom fans, dust collectors, HVAC systems, inline ventilators, cooker hoods, tumble dryers, and hydroponics systems, making it a great fit for any space in your home, office, or apartment. - Versatile Plastic Rigid Ducting: Used to increase from a larger appliance flue outlet to a smaller diameter chimney or stove pipe. - Crafted from durable ABS plastic, this versatile duct reducer/increaser seamlessly connects various duct sizes or types, which is ideal for home improvement, DIY projects, and professional use. - Ideal for applications like tumble dryers, extractor fans, hydroponic systems, in-line extract fans, and cooker hoods. - Universally compatible and easy to install with various pipes, vents, and connectors; suitable for HVAC systems, bathroom fans, inline ventilators, cooker hoods, tumble dryers and more in any residential or commercial setting. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B08KWGT71G | | Best Sellers Rank | 258,622 in DIY & Tools (See Top 100 in DIY & Tools) 700 in Ducting | | Brand | Vent Systems | | Colour | White | | Connector Type | Adapter, Reducer | | Country Of Origin | Poland | | Customer Reviews | 4.2 4.2 out of 5 stars (316) 4.2 out of 5 stars | | Exterior Finish | ABS | | Included Components | Duct connector screw | | Item Dimensions | 13 x 13 x 6.5 centimetres | | Manufacturer | Vent Systems | | Material | Plastic | | Number Of Packs | 1 | | Number Of Pieces | 1 | | Size | 100 - 125 mm / 4" - 5" | | Thread Type | Metric parallel or metric cone | | Unit Count | 1.0 count | ## Product Details - **Size:** 100 - 125 mm / 4" - 5" - **Material:** Plastic - **Brand:** Vent Systems - **Colour:** White - **Item dimensions L x W x H:** 13 x 13 x 6.5 centimetres - **Connector type:** Adapter, Reducer - **Exterior finish:** ABS - **Thread type:** Metric parallel or metric cone - **Item weight:** 45 g - **Number of pieces:** 1 ## Images ![Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe - Image 1](https://m.media-amazon.com/images/I/41lttZpr-BL.jpg) ![Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe - Image 2](https://m.media-amazon.com/images/I/51aYa+XeZ1L.jpg) ![Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe - Image 3](https://m.media-amazon.com/images/I/71ixDE0cmyL.jpg) ![Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe - Image 4](https://m.media-amazon.com/images/I/81UBJL+4n8L.jpg) ![Vent Systems 125 to 100 mm / 5" to 4" Inch - White Plastic Duct Reducer Adapter - Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic, PVC Pipe - Image 5](https://m.media-amazon.com/images/I/81tmNYwXR3L.jpg) ## Available Options This product comes in different **Size Name, Item Package Quantity** options. ## Customer Reviews ### ⭐⭐⭐⭐ Sturdy and looks good *by on Reviewed in the United Kingdom 17 May 2025* Couldn't get the exact size I wanted but using some thick tape, it's now ok ### ⭐ Too Small *by on Reviewed in the United Kingdom 19 March 2026* 1 to 2 mls small . Can't join it to the inline fan . ### ⭐⭐⭐⭐⭐ Très bien *by on Reviewed in France 21 April 2025* Très bien ## Frequently Bought Together - Vent Systems 4" to 5" Inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC Pipe 125 to 100 mm - Vent Systems 5" inch to 4" inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC pipe 125 to 100 mm - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust --- ## 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.gr/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch](https://www.desertcart.gr/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-01*