--- product_id: 385224115 title: "PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm" brand: "karmat" price: "151 zΕ‚" currency: PLN in_stock: false url: https://www.desertcart.pl/products/385224115-pvc-plastic-check-sewage-drain-non-return-double-flap-valve store_origin: PL region: Poland --- # Rodent entry prevention 160mm pipe fit Double-flap backflow protection PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm **Brand:** karmat **Price:** 151 zΕ‚ **Availability:** ❌ Out of Stock ## Summary > πŸ› οΈ Secure your space with the ultimate backflow barrier! ## Quick Answers - **What is this?** PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm by karmat - **How much does it cost?** 151 zΕ‚ with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/385224115-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 - β€’ **Rodent Blockade:** Built-in barrier stops rodents from invading your building through drains. - β€’ **Dual-Flap Defense:** Advanced double-flap design ensures maximum backflow and flood prevention. - β€’ **Precision 160mm Fit:** Seamlessly integrates with standard sewage pipes for hassle-free installation. - β€’ **Flood-Proof Your Space:** Protects lower floors from costly water damage caused by stormwater backflow. - β€’ **Lightweight Durability:** Crafted from robust polypropylene, combining strength with easy handling at just 4kg. ## Overview The Karmat 160mm PVC double-flap valve is a lightweight, polypropylene sewage backwater preventer designed to fit standard pipes. It effectively blocks rodent entry and prevents flooding caused by sewage and stormwater backflow, safeguarding building interiors and lower floors with a reliable dual-flap mechanism. ## 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 95Β°C). Movable construction elements of valves are made of a material strengthened with fiberglass. ## Features - Installed in 160mm 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 | |---------------|-------| | Manufacturer | Karmat | | Part number | 451b | | Item Weight | 4 Kilograms | | Manufacturer reference | 451b | | Material | Polypropylene | | Item Package Quantity | 1 | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Material:** Polypropylene - **Exterior finish:** Nickel - **Inlet connection type:** Flange - **Outlet connection type:** Flange - **Number of ports:** 2 ## Images ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm - Image 1](https://m.media-amazon.com/images/I/41+KwnFWWbL.jpg) ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm - Image 2](https://m.media-amazon.com/images/I/71A8W1upj+L.jpg) ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm - Image 3](https://m.media-amazon.com/images/I/81PQLsQ8s5L.jpg) ![PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm - Image 4](https://m.media-amazon.com/images/I/61XlnR5QLLL.jpg) ## Frequently Bought Together - PVC Plastic Check Sewage Drain Non-Return Double Flap Valve Backwater Prevented 160mm - 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? - 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.pl/products/385224115-pvc-plastic-check-sewage-drain-non-return-double-flap-valve](https://www.desertcart.pl/products/385224115-pvc-plastic-check-sewage-drain-non-return-double-flap-valve) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*