--- product_id: 152832628 title: "Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White" brand: "mkk" price: "€ 47.26" currency: EUR in_stock: true category: "Mkk" url: https://www.desertcart.be/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round store_origin: BE region: Belgium --- # 100 mm diameter seamless fit Durable PVC plastic build Backflow flap prevents air return Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White **Brand:** mkk **Price:** € 47.26 **Availability:** βœ… In Stock ## Summary > πŸŒ€ Keep your air fresh, your space flawless. ## Quick Answers - **What is this?** Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White by mkk - **How much does it cost?** € 47.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round) ## Best For - mkk enthusiasts ## Why This Product - Trusted mkk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Universal Compatibility:** Fits apartments, houses, and commercial buildings with easeβ€”upgrade your ventilation system effortlessly. - β€’ **Backflow Flap Technology:** Innovative flap design stops unwanted air return, maintaining fresh airflow only. - β€’ **Durable PVC Construction:** Robust, smooth plastic surface built to last and resist wear in any environment. - β€’ **Seamless 100 mm Connection:** Perfectly sized for standard ventilation pipes ensuring airtight integration. - β€’ **Trusted Quality & Warranty:** Backed by a 2-year manufacturer guarantee and top-rated by thousands of HVAC pros. ## Overview This 100 mm diameter PVC connector with an integrated backflow flap is designed for ventilation systems in residential and commercial buildings. It ensures one-way airflow, preventing air return and maintaining fresh air circulation. Featuring a smooth white finish and durable construction, it fits standard round ducts and comes with a 2-year manufacturer warranty, making it a reliable choice for efficient HVAC setups. ## Description Ventilation systems are intended for air distribution in ventilation systems of apartments, houses and commercial buildings. Perfect for places where the air should not return and only fresh air should remain. Connection from pipe to pipe. Specifications: Material: PVC plastic; Colour: white; Diameter: 100 mm. Note: The backflow flap may be red, blue or green in contrast to the product image. The connector itself is white ## Features - Material: PVC plastic - Colour: white - Diameter: 100 mm - Kitchen - Volume: 0.001 m3 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00FCE0RSE | | Best Sellers Rank | #893,660 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,470 in HVAC Ducting | | Brand Name | MKK | | Color | White | | Connector Type | Plug | | Customer Reviews | 4.3 4.3 out of 5 stars (3,533) | | Exterior Finish | Smooth plastic surface | | Included Components | No | | Item Dimensions | 3.94 x 3.94 x 2.36 inches | | Item Type Name | Building material | | Manufacturer | MKK | | Manufacturer Part Number | A289a_SML | | Manufacturer Warranty Description | 2 Year Manufacturer Guarantee. | | Material Type | Polyvinyl Chloride | | Model Number | KO100-22 | | Number of Packs | 1 | | Number of Pieces | 1 | | Size | Klein | | Thread Size | 4 inch | | Thread Type | UN | | Unit Count | 1 Count | ## Product Details - **Brand:** MKK - **Color:** White - **Connector Type:** Plug - **Exterior Finish:** Smooth plastic surface - **Item dimensions L x W x H:** 3.94 x 3.94 x 2.36 inches - **Material:** Polyvinyl Chloride - **Number of Pieces:** 1 - **Size:** Klein - **Thread Size:** 4 inch - **Thread Type:** UN ## Images ![Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - Image 1](https://m.media-amazon.com/images/I/410JRbLJ-6L.jpg) ![Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - Image 2](https://m.media-amazon.com/images/I/61Sf3d3RwsL.jpg) ![Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - Image 3](https://m.media-amazon.com/images/I/41NTOGieKAL.jpg) ![Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - Image 4](https://m.media-amazon.com/images/I/41UqnXvbw6L.jpg) ![Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - Image 5](https://m.media-amazon.com/images/I/4161WRlGmgL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Frequently Bought Together - Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm) - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-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.be/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round](https://www.desertcart.be/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-08-24*