--- product_id: 51173976 title: "Ducting Pipe Non Return Valve 100mm Round Duct Rigid Tube Connector with Shutter Extractor Fan Backdraft Damper Stopper KO100-22" brand: "mkk" price: "S$16" currency: SGD in_stock: true reviews_count: 13 url: https://www.desertcart.sg/products/51173976-ducting-pipe-non-return-valve-100mm-round-duct-rigid-tube store_origin: SG region: Singapore --- # Quick & easy installation Ø100mm perfect fit Backdraft damper blocks reverse flow Ducting Pipe Non Return Valve 100mm Round Duct Rigid Tube Connector with Shutter Extractor Fan Backdraft Damper Stopper KO100-22 **Brand:** mkk **Price:** S$16 **Availability:** ✅ In Stock ## Summary > 🚀 Stop drafts, start comfort — the smart ducting upgrade you didn’t know you needed! ## Quick Answers - **What is this?** Ducting Pipe Non Return Valve 100mm Round Duct Rigid Tube Connector with Shutter Extractor Fan Backdraft Damper Stopper KO100-22 by mkk - **How much does it cost?** S$16 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/51173976-ducting-pipe-non-return-valve-100mm-round-duct-rigid-tube) ## 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 - • **Effortless Setup:** Lightweight PVC design ensures a quick, no-fuss installation every time. - • **Backdraft Blocker:** Prevents cold air and unwanted drafts from sneaking back inside your space. - • **Compact & Discreet:** Sleek white finish blends seamlessly with your ducting system, maintaining a clean aesthetic. - • **Durable & Reliable:** Crafted from high-quality PVC with a 2-year manufacturer warranty for peace of mind. - • **Seamless Ø100mm Integration:** Fits snugly into standard round duct pipes for a flawless connection. ## Overview The KO100-22 Ducting Pipe Non Return Valve is a 100mm round PVC connector designed to join duct pipes securely while preventing backflow with its integrated shutter damper. Lightweight and easy to install, it ensures efficient airflow control and energy savings, backed by a 2-year warranty. ## Description This high-quality white plastic pipe connector is used as a connector of two pipes. The pipes are pushed over connectors. The bridge in the middle prevents the pipes from slipping through. This connector is used in a round pipe system. Please note that the connector is slightly smaller as the dimensions refer to the inner dimensions of the pipe that is pushed over the pipe connector. The backflow flap prevents cold air from entering the interior unhindered from outside. A backflow flap is especially useful when the pipe is mounted outside on a house wall or similar. ## Features - Connector fits into Ø100mm round pipe ducting - Equipped with a back draft damper for back flow prevention - Quick and easy fit - Lightweight Material: PVC ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B00FCE0RSE | | Best Sellers Rank | 25,921 in Garden (See Top 100 in Garden) 651 in Garden Hose Parts & Connectors | | Brand | MKK | | Colour | White | | Connector Type | Plug | | Country Of Origin | China | | Customer Reviews | 4.4 4.4 out of 5 stars (3,578) 4.4 out of 5 stars | | Exterior Finish | Glatte Kunststoffoberfläche | | Included Components | No | | Item Dimensions | 10 x 10 x 6 centimetres | | Item Type Name | Building material: | | Manufacturer | Armar Trading LTD | | Manufacturer Warranty Description | 2 year manufacturer guarantee. | | Material | Polyvinyl Chloride | | Model Number | KO100-22 | | Number Of Packs | 1 | | Number Of Pieces | 1 | | Part Number | A289a_SML | | Set Name | Small White | | Size | Klein | | Thread Size | M100 | | Thread Type | UN | | Unit Count | 1 unité | ## Product Details - **Brand:** MKK - **Colour:** White - **Connector type:** Plug - **Exterior finish:** Glatte Kunststoffoberfläche - **Item dimensions L x W x H:** 10 x 10 x 6 centimetres - **Material:** Polyvinyl Chloride - **Number of pieces:** 1 - **Size:** Klein - **Thread size:** M100 - **Thread type:** UN ## Images ![Ducting Pipe Non Return Valve 100mm Round Duct Rigid Tube Connector with Shutter Extractor Fan Backdraft Damper Stopper KO100-22 - Image 1](https://m.media-amazon.com/images/I/410JRbLJ-6L.jpg) ## Available Options This product comes in different **Colour Name, Size Name** options. ## Questions & Answers **Q: Do this product have a spring to close the back shutter? Or does is use gravity to close it once the flow stops?** A: Gravity - it does rattle in the wind **Q: Can this be fitted on a 45 deg slop downwards to the outside vent and will it still work fully? Thanks** A: Oh not so sure it will stay closed at that angle. I have mine fitted on a flat surface and it works perfect. **Q: Is this product suitable for extracting cooking fumes and steam?** A: Hi I have used this item to prevent a back draught in ducting for an online bathroom steam extraction system. **Q: On an in-line fan. where is the best place to put one of these? before the fan or after? and does it go onto the fan spigots? or the end of the ducts?** A: It goes after the fan in the exhaust direction to prevent draughts returning through the vent back into the room/device being vented. It is designed to fit in line in the pipework and will need glueing into rigid pipework or securing with a large pair of jubilee clips into flexible pipes whether plastic or aluminium. You should find on a reasonable external vent kit that it also contains a non return flap, however if you're hooking up multiple rooms in series (i.e. on a single pipe), these also reduce the amount of noise which leaks through the vents ## Customer Reviews ### ⭐⭐⭐⭐⭐ Seems to be fine. *by on Reviewed in the United Kingdom 26 October 2022* Wanting to replace two rubbish "Silavent" ceiling extractor fans with inline fans, I needed to source to vents with shutters, but none were available. So I bought two KAIR vents and two of these.They fit standard 4" (100mm) solid or flexible duct pipe.These are unsprung gravity flaps, so they need to be fitted nothing but vertically to operate properly. Fitted any other way and they won't close. They are also best fitted at the vent in the ceiling so they become dual purpose backdraught and odour eliminators.They seem good quality and due to them not having springs, there's nothing to go rusty and stop working. ### ⭐⭐⭐⭐⭐ Works great but better with flexible pipe *by on Reviewed in the United Kingdom 22 June 2020* Great easy way to avoid installing a new gravity or cowl vent. I thought it would push fit on the fan and rigid pipe at 100mm, however this is not the case as it’s exactly the same diameter as the duct pipe of 100mm. Therefore just used duct tape to join to a flexible pipe and it’s fine. Cut off half inch of insulation tape and taped to bottom of vent to stop any clanking noise and it’s prettyMuch silent. A bit pricey for a flimsy bit of plastic but it works ### ⭐⭐⭐⭐ Works well and easy to fit *by on Reviewed in the United Kingdom 12 March 2020* I had 2 bathroom inline fans that allowed stronger winds to cool the bathrooms and create drafts. The backdraft shutters were very easy to install. The first fitted snugly over the fan spigot and the flexible hose was easy to secure to the other side of the shutter. The second fan spigot was the same diameter as the shutter so could only be butted up and secured with duck tape. Not ideal but functional and secure. The drafts have been considerably reduced and a good solution. ## 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? - 🛒 **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.sg/products/51173976-ducting-pipe-non-return-valve-100mm-round-duct-rigid-tube](https://www.desertcart.sg/products/51173976-ducting-pipe-non-return-valve-100mm-round-duct-rigid-tube) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-28*