--- product_id: 18731898 title: "POWERTEC 70145 4-Inch to 3-Inch Reducer" brand: "powertec" price: "€ 15.07" currency: EUR in_stock: true reviews_count: 13 category: "Powertec" url: https://www.desertcart.pt/products/18731898-powertec-70145-4-inch-to-3-inch-reducer store_origin: PT region: Portugal --- # 4-inch to 3-inch seamless reducer Heat resistant up to 176°F (80°C) Heavy-duty ABS plastic durability POWERTEC 70145 4-Inch to 3-Inch Reducer **Brand:** powertec **Price:** € 15.07 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your dust collection game with precision and durability! ## Quick Answers - **What is this?** POWERTEC 70145 4-Inch to 3-Inch Reducer by powertec - **How much does it cost?** € 15.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/18731898-powertec-70145-4-inch-to-3-inch-reducer) ## Best For - powertec enthusiasts ## Why This Product - Trusted powertec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Lightweight:** Measuring just over 4 inches and weighing 3.36 ounces, it’s easy to install without adding bulk. - • **Versatile Application:** Perfect for dust collection systems, dryer vents, and laser engravers within safe temperature limits. - • **Durable ABS Construction:** Crafted from premium ABS plastic that resists rust, corrosion, and withstands hose clamp pressure for long-lasting use. - • **Optimized Airflow Control:** Tapered port design boosts air velocity exactly where your dust collection needs it most. - • **Precision Fit & Secure Connection:** Engineered to flawlessly connect 4-inch OD hoses to 3-inch ID lines, ensuring no dust escapes your system. ## Overview The POWERTEC 70145 reducer is a high-quality dust collection adapter that transitions between 4-inch and 3-inch hoses. Made from heavy-duty ABS plastic, it offers a secure, durable fit designed to optimize airflow and withstand workshop conditions up to 176°F. Ideal for woodworking dust systems, dryer vents, and laser engravers, this compact reducer ensures efficient dust management with a professional-grade build. ## Description This dust collection fitting allows you to connect a 3-inch ID opening to 4-inch flexible hose and/or transition a 3-inch ID opening to 4-inch ID standard hose. It’s easy to use and offers a secure, quick attachment to your dust collector hose. It’s ideal for increasing air velocity near the machine where it's needed most. Additionally, it features a tapered port on one side that fits inside most 3" dust collection hose. Heavy Duty Quality We make our reducers utilizing premium ABS plastic material, which provides long-term durability with resistance to rust and corrosion. It’s thick walls are intended to stand up to hose clamp pressure and the abrasive nature of woodworking and workshop dust collection. Specifications Color: Black Material: ABS Plastic 4-Inch Nominal End Measures: 3-15/16-inch outer diameter by 3-45/56-inch inner diameter 3-Inch Nominal End Measures: 2-63/64-inch outer diameter by 2-23/32-inch inner diameter POWERTEC is a leading manufacturer of high quality wood work accessories, sanding discs and an assortment of OEM replacement parts. We are committed to exceeding expectations, while bringing the latest innovations, technology, and product development to the industry. Review: Fit perfect - Perfect little expensive Review: Works well. - As described; works well. ## Features - INCLUDES: 4-inch to 3-inch dust collection reducer (1pc) - FUNCTION: This dust collector attachment possesses a 4-inch OD end that connects to standard 4-inch ID dust collection hose and allows you to step down to a 3-inch dust collection hose or line branch. ｜ Note: to connect to other 4” OD ports or adapters, a 4” flex cuff, POWERTEC 70149, will be needed. - APPLICATION: Designed for dust collection systems. Also suitable for dryer vents and laser engravers when exhaust temperatures remain within the ABS material’s recommended range (up to 176°F / 80°C). - PREMIUM QUALITY & EASY TO USE: Made with heavy-duty ABS plastic for long-term durability and features a 4” OD profile with a tapered port on one side that fits inside most 3” dust collection hoses. - DIMENSIONS: 4-Inch O.D nominal end (measures 3-15/16”) | 3-Inch O.D nominal end (measures 2-31/32”) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00M3IT378 | | Best Sellers Rank | #42,182 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #45 in Vacuum & Dust Collector Replacement Parts | | Brand | POWERTEC | | Brand Name | POWERTEC | | Color | 4" to 3" Reducer | | Connector Type | Reducer | | Customer Reviews | 4.5 out of 5 stars 914 Reviews | | Exterior Finish | ABS | | Global Trade Identification Number | 00736815005960 | | Included Components | 4-Inch to 3-Inch Reducer | | Item Dimensions | 4.14 x 4.14 x 3.44 inches | | Item Type Name | POWERTEC 70145 4-Inch to 3-Inch Reducer | | Item Weight | 3.36 ounces | | Item dimensions L x W x H | 4.14 x 4.14 x 3.44 inches | | Manufacturer | Southern Technology LLC | | Manufacturer Part Number | 70145 | | Material | ABS plastic | | Material Type | ABS plastic | | Model Number | 70145 | | Number of Packs | 1 | | Number of Pieces | 1 | | Size | 1 Count (Pack of 1) | | Thread Size | 3 inches | | UPC | 736815005960 | | Unit Count | 1 Count | ## Product Details - **Brand:** POWERTEC - **Color:** 4" to 3" Reducer - **Connector Type:** Reducer - **Exterior Finish:** ABS - **Item Weight:** 0.21 Pounds - **Item dimensions L x W x H:** 4.14 x 4.14 x 3.44 inches - **Material:** ABS plastic - **Number of Pieces:** 1 - **Size:** 1 Count (Pack of 1) - **Thread Size:** 3 inches ## Images ![POWERTEC 70145 4-Inch to 3-Inch Reducer - Image 1](https://m.media-amazon.com/images/I/51bbjT1EtkS.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the ID of the 3inch side?** A: I bought this for my grizzly shaper with a 3" dust port. the 3" end is the same OD as the shaper. What I had to buy was a 3" x 6" piece of dust collector hose. I think Rockler sells it. Good luck. **Q: I need a 2.75 Outer diameter to 4”.. will this fitting work?** A: Read the specs carefully. It is designed to connect 4" to 3" dia hose. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fit perfect *by B***L on October 13, 2025* Perfect little expensive ### ⭐⭐⭐⭐⭐ Works well. *by K***R on August 12, 2026* As described; works well. ### ⭐⭐⭐⭐⭐ Great accessory for the Diesel Heaters *by M***N on February 11, 2025* Got a diesel heater with 3" output and balking at the price of 3" vent extensions? 4" is the universal cheap clothes dryer output and vent extensions of any length are available dirt cheap in that size. So what do you do. You get one of those guys for couple of bucks and free yourself to use that ubiquitous ducting. Sure, it would be nice if they used 4" off the hop, but when the design was stolen all those years ago, it must have used a 3" output, so the chinese clones use a 3" output today. This won't flow more air, nor will it restrict, but it will open up a myriad of cheaper options for routing heat. Does that job perfectly and I will get one for each heater. ## Frequently Bought Together - POWERTEC 70145 4-Inch to 3-Inch Reducer - Daisypower Dryer Vent Window Kit, Adjustable Window Vent Kit with Outdoor Dryer Vent Cover,4 Inch Hood for Exhaust Ventilation - VIVOSUN D4 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent --- ## 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.pt/products/18731898-powertec-70145-4-inch-to-3-inch-reducer](https://www.desertcart.pt/products/18731898-powertec-70145-4-inch-to-3-inch-reducer) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-14*