--- 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: "4963 kr" currency: ISK in_stock: true reviews_count: 7 category: "Vent Systems" url: https://www.desertcart.is/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch store_origin: IS region: Iceland --- # Fits 125mm to 100mm ducts Universal HVAC compatibility Durable ABS plastic build 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:** 4963 kr **Availability:** βœ… In Stock ## Summary > πŸ”§ Upgrade your airflow game with the ultimate duct adapter! ## 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?** 4963 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/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 - β€’ **Sleek White Finish:** Blends discreetly into modern home and office ventilation systems. - β€’ **Versatile HVAC Adapter:** Compatible with fans, dryers, ventilators, and moreβ€”your all-in-one solution. - β€’ **Robust ABS Construction:** Engineered for long-lasting durability in any environment. - β€’ **Seamless Size Transition:** Effortlessly connects 5" to 4" ducts for perfect airflow. - β€’ **Quick & Easy Installation:** Designed for hassle-free setup, saving you time and effort. ## Overview The Vent Systems 125 to 100 mm White Plastic Duct Reducer Adapter is a durable ABS plastic connector designed to seamlessly join 5" and 4" HVAC ducts. Ideal for a wide range of ventilation applications including bathroom fans, tumble dryers, and hydroponic systems, it offers universal compatibility and easy installation, making it a must-have for professional and DIY HVAC projects. ## Description Free delivery and returns on all eligible orders. Shop 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. Review: Sturdy and looks good - Couldn't get the exact size I wanted but using some thick tape, it's now ok Review: Too Small - 1 to 2 mls small . Can't join it to the inline fan . ## 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 | 264,288 in DIY & Tools ( See Top 100 in DIY & Tools ) 732 in Ducting | | Brand | Vent Systems | | Colour | White | | Connector Type | Adapter, Reducer | | Connector type | Adapter , Reducer | | Country of Origin | Poland | | Customer Reviews | 4.2 out of 5 stars 320 Reviews | | Exterior Finish | ABS | | Included Components | Duct connector screw | | Item Dimensions | 13 x 13 x 6.5 centimetres | | Item dimensions L x W x H | 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) ## Customer Reviews ### ⭐⭐⭐⭐ Sturdy and looks good *by D***E on 17 May 2025* Couldn't get the exact size I wanted but using some thick tape, it's now ok ### ⭐ Too Small *by S***D on 19 March 2026* 1 to 2 mls small . Can't join it to the inline fan . ### ⭐⭐⭐⭐⭐ TrΓ¨s bien *by M***R on 21 April 2025* TrΓ¨s 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch](https://www.desertcart.is/products/360660240-vent-systems-125-to-100-mm-5-to-4-inch) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-09-29*