--- product_id: 54692191 title: "PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm" brand: "karmat" price: "2818 kr" currency: DKK in_stock: true reviews_count: 1 category: "Karmat" url: https://www.desertcart.dk/products/54692191-pvc-plastic-check-sewage-drain-non-return-double-flap-valve store_origin: DK region: Denmark --- # Chromium-nickel guards block rodent intrusion Durable polypropylene resists chemicals & heat Double-flap design for max backflow protection PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm **Brand:** karmat **Price:** 2818 kr **Availability:** ✅ In Stock ## Summary > 🚫🌊 Keep floods & pests out with next-level backwater defense! ## Quick Answers - **What is this?** PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm by karmat - **How much does it cost?** 2818 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/54692191-pvc-plastic-check-sewage-drain-non-return-double-flap-valve) ## Best For - karmat enthusiasts ## Why This Product - Trusted karmat brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Modular Safety Upgrade:** Expandable multi-flap system lets you customize protection for ultimate peace of mind. - • **Rodent-Resistant Barrier:** Chromium-nickel guards secure flaps, preventing rodents from sneaking in through pipes. - • **Smooth, Self-Cleaning Flow:** Innovative flap design ensures uninterrupted sewage flow with zero sediment buildup. - • **Built to Last & Eco-Friendly:** High-grade polypropylene and fiberglass-reinforced parts withstand harsh chemicals and temps up to 95°C. - • **Floodproof Your Lower Floors:** Double-flap valve stops stormwater & sewage backflow before it hits your space. ## Overview The Karmat 110mm PVC Double Flap Backwater Valve is a high-performance sewage valve designed to prevent flooding and rodent intrusion in lower-floor spaces. Featuring chromium-nickel guards and a modular double-flap system, it ensures smooth, self-cleaning sewage flow while resisting aggressive chemicals and temperatures up to 95°C. Ideal for installation in horizontal sewage pipes, it meets building code requirements for flood protection with durable, eco-friendly polypropylene construction. ## Description KARMAT Backwater Valves (non-return valves) effectively secure any rooms located on the lower floors against flooding caused by back flow of storm water and sewage. Back flow may be caused by intense rains, thaw or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory regulations related to technical conditions that are to be satisfied by building codes. Karmat backwater valves are devices in which the flaps are equipped with chromium - nickel protecting guards securing the flap and gasket against rats and its sliding down during sewage flow. It is a very important feature in places particularly exposed to rodents’ attempts to pass through. Innovative construction of multi-flap valves enables undisturbed sewage flow while preserving complete and unnarrowed clearance of pipes in which they are installed. Unlike other devices of this type available in the market the Karmat double flap backwater valves there are no inserts installed inside which may disturb or obstruct sewage flow. Double flap backwater valves have smooth internal surfaces suitably profiled which causes its self-cleaning and prevents collection of sediments. Module construction of multi-flap valves enables in special cases, as required by clients, to extend devices with additional, independent flaps which greatly increase buildings safety. Backwater valves are installed in horizontal sewage pipes before they exit a building or sewage drain outside the building before its connection to an external network. They are also installed in inspection chambers made of concrete or plastic. Backwater valves are made of high-quality polypropylene (PP), a very durable and environment-friendly material. Polypropylene is resistant to the effects of aggressive chemicals and hot sewage (up to 95°C). Movable construction elements of valves are made of a material strengthened with fiberglass. Review: Realmente satisfecho con el producto, calidad súper!!! ## Features - Installed in 110mm sewage pipes before they exit a building or sewage drains; - Prevents against rodents entering building interiors through the sewage and other sanitary systems; - Secure the lower floors against flooding caused by back flow of storm water and sewage; - Double-flap backwater valves offer a greater choice of security devices ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00IYUWTQG | | Best Sellers Rank | 155,153 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 1,369 in Pipes | | Brand | Karmat | | Connector Type | Flanged | | Customer Reviews | 4.7 4.7 out of 5 stars (3) | | Exterior Finish | Nickel | | Inlet Connection Type | Flange | | Item Weight | 1.88 Kilograms | | Manufacturer | Karmat | | Material | Nickel, Plastic | | Number of Ports | 2 | | Size | 110mm | | Unit Count | 1.0 count | | Valve Type | Check Valve | ## Product Details - **Brand:** Karmat - **Exterior finish:** Nickel - **Inlet connection type:** Flange - **Manufacturer:** Karmat - **Material:** Nickel, Plastic - **Number of ports:** 2 ## Images ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm - Image 1](https://m.media-amazon.com/images/I/41mpcl+gVvL.jpg) ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm - Image 2](https://m.media-amazon.com/images/I/71A8W1upj+L.jpg) ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm - Image 3](https://m.media-amazon.com/images/I/81PQLsQ8s5L.jpg) ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm - Image 4](https://m.media-amazon.com/images/I/61XlnR5QLLL.jpg) ## Questions & Answers **Q: is this valve roddable** A: Double flap backwater valves have smooth internal surfaces suitably profiled which causes its self-cleaning and prevents collection of sediments Both flaps can be manually locked in the open or closed position ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***L on 7 April 2025* Realmente satisfecho con el producto, calidad súper!!! ## Frequently Bought Together - PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 110mm - Retro Fit 110mm 4 inch Drain Non Return Valve with Stainless Steel Flap - Buffalo Pest Control Water and Rodent Non Return Valve 110mm / 4 inch --- ## 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.dk/products/54692191-pvc-plastic-check-sewage-drain-non-return-double-flap-valve](https://www.desertcart.dk/products/54692191-pvc-plastic-check-sewage-drain-non-return-double-flap-valve) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-05-10*