--- product_id: 498871213 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: "฿2879" currency: THB in_stock: true reviews_count: 6 category: "Vent Systems" url: https://www.desertcart.co.th/products/498871213-vent-systems-125-to-100-mm-5-to-4-inch store_origin: TH region: Thailand --- # 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:** ฿2879 **Availability:** ✅ In Stock ## Summary > 🔄 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?** ฿2879 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/498871213-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 - • **Versatile Application:** Ideal for HVAC, bathroom fans, cooker hoods, and more. - • **Lightweight Yet Sturdy:** Only 30g but built to withstand daily wear and tear. - • **Robust ABS Construction:** Engineered for long-lasting durability in any environment. - • **Seamless Size Transition:** Effortlessly connects 5" to 4" ducts for perfect airflow. - • **Quick & Easy Installation:** Universal fit ensures hassle-free setup for pros and DIYers alike. ## Overview The Vent Systems 125 to 100 mm White Plastic Duct Reducer Adapter is a lightweight, durable ABS plastic fitting designed to connect 5" ducts to 4" ducts seamlessly. Perfect for HVAC systems, bathroom fans, cooker hoods, and other ventilation needs, it offers universal compatibility and easy installation for both professional and home use. ## 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: Très bien ## 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 | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 141,898 in DIY & Tools ( See Top 100 in DIY & Tools ) 373 in Ducting | | Colour | White | | Customer Reviews | 4.2 4.2 out of 5 stars (295) | | Date First Available | 8 Oct. 2020 | | Item Package Quantity | 1 | | Item Weight | 30 g | | Manufacturer | Vent Systems | | Material | Plastic | | Number of Pieces | 1 | | Product Dimensions | 13 x 13 x 6.5 cm; 30 g | | Shape | Circular | | Size | 100 - 125 mm / 4" - 5" | | Usage | Amateur, Inside, Outside, Professional | ## Product Details - **Brand:** Vent Systems - **Colour:** White - **Connector type:** Adapter, Reducer - **Exterior finish:** ABS - **Item dimensions L x W x H:** 13 x 13 x 6.5 centimetres - **Manufacturer:** Vent Systems - **Material:** Plastic - **Number of pieces:** 1 - **Size:** 100 - 125 mm / 4" - 5" - **Thread type:** Metric parallel or metric cone ## 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, Item Package Quantity** options. ## 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 ### ⭐⭐⭐⭐⭐ Review *by M***R on 21 April 2025* Très bien ### ⭐⭐⭐⭐⭐ Review *by J***A on 19 September 2025* Perfecto encaje desde un tubo extensible de aluminio de 100 mm a un tubo metalico de salida al exterior de 120 mm ## Frequently Bought Together - Vent Systems 8" to 6" Inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC Pipe 200 to 150 mm - AC Infinity Flexible 6-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust - 8 to 6 Inch Duct Reducer, Hon&Guan Duct Adapter 8 to 6 PVC Reducer, Duct Increaser/Reducer for Grow Tent HVAC Ventilation System. (200 to 150mm) --- ## 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.co.th/products/498871213-vent-systems-125-to-100-mm-5-to-4-inch](https://www.desertcart.co.th/products/498871213-vent-systems-125-to-100-mm-5-to-4-inch) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-29*