--- product_id: 49023844 title: "Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm" brand: "plumbing4home" price: "£61.71" currency: GBP in_stock: true category: "Plumbing4 Home" url: https://www.desertcart.co.uk/products/49023844-horizontal-pvc-plastic-sewage-drain-check-non-return-valve-backwater store_origin: GB region: United Kingdom --- # Rodent-proof gasket - ultimate protection High-grade PVC & PP - chemical & heat resistant 110mm pipe fit - seamless integration Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm **Brand:** plumbing4home **Price:** £61.71 **Availability:** ✅ In Stock ## Summary > 🚿 Stop backflow before it starts — protect your space with smart plumbing! ## Quick Answers - **What is this?** Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm by plumbing4home - **How much does it cost?** £61.71 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/49023844-horizontal-pvc-plastic-sewage-drain-check-non-return-valve-backwater) ## Best For - plumbing4home enthusiasts ## Why This Product - Trusted plumbing4home brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Durable polypropylene and PVC withstand harsh chemicals & hot sewage up to 95°C - • **Effortless Installation:** Fits standard 110mm sewage pipes with solvent connections—no power needed - • **Rodent-Resistant Design:** Special gasket and guard prevent pest intrusion through sewage lines - • **Smooth Flow, Zero Sediment:** Optimized interior profile prevents clogging and ensures uninterrupted drainage - • **Floodproof Your Lower Floors:** Automatic backflow prevention for peace of mind ## Overview The KARMAT Horizontal PVC Plastic Sewage Drain Check Non-Return Valve is a robust 110mm backwater valve designed to prevent sewage and stormwater backflow, protecting lower floors from flooding. Made from high-quality polypropylene and PVC, it resists chemicals and hot sewage up to 95°C. Its rodent-proof gasket and smooth interior ensure durability and uninterrupted flow, while requiring no external power and fitting seamlessly into standard sewage pipes. ## 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. The shape of the protecting guard and gasket has been designed to protect against damage of the gasket by rodents and sliding during sewage flow. Advantages: - Karmat backwater valves operate automatically and do not require any external power supply. Any operations related to the device’s use are very simple and possible to be carried out by any user; - Due care of workmanship and high quality materials used in the manufacturing process guarantee efficient operation and high durability of the product; - The device’s interior with its smooth surface properly profiled, protects against sediment collection and grants complete and undisturbed sewage flow. - Gaskets have been manufactured from a rubber of high resistance to atmospheric influences and to aging Owing to its construction the Karmat backwater valve may successfully replace an access pipe installed in the outlet of sanitary sewage pipes from buildings. 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. ## Features - KARMAT Backwater Valves effectively secure any rooms located on the lower floors; - 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; - Made of high-quality PVC Plastic - resistance to the effects of chemicals and hot sewage; ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BWNXV00 | | Best Sellers Rank | 16,639 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 501 in Pipe Fittings | | Brand | PLUMBING4HOME | | Connector Type | Adapter | | Customer Reviews | 4.6 4.6 out of 5 stars (42) | | Exterior Finish | Nickel | | Inlet Connection Size | 1.1E+2 Millimeters | | Inlet Connection Type | Solvent | | Item Weight | 0.88 Kilograms | | Manufacturer | Karmat | | Material | Plastic, Polypropylene (PP), Polyvinyl Chloride (PVC) | | Maximum Pressure | 0.5 Bars | | Model Number | 5907484551231 | | Number of Pieces | 1 | | Number of Ports | 1 | | Outlet Connection Size | 1.1E+2 Millimeters | | Outlet Connection Type | Solvent | | Part Number | 450b | | Size | 110mm | | Smart Home Compatibility | Not Smart Home Compatible | | Specification Met | CE, WRAS | | Thread Size | 110 mm | | Thread Type | BSP | | Unit Count | 1.0 count | | Valve Type | Backwater Valve | ## Product Details - **Brand:** PLUMBING4HOME - **Exterior finish:** Nickel - **Inlet connection size:** 1.1E+2 Millimeters - **Inlet connection type:** Solvent - **Material:** Plastic, Polypropylene (PP), Polyvinyl Chloride (PVC) - **Maximum operating pressure:** 0.5 Bars - **Number of ports:** 1 - **Outlet connection size:** 1.1E+2 Millimeters - **Outlet connection type:** Solvent - **Specification met:** CE, WRAS ## Images ![Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm - Image 1](https://m.media-amazon.com/images/I/518Md58TC4L.jpg) ![Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm - Image 2](https://m.media-amazon.com/images/I/717J1jtQrBL.jpg) ![Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm - Image 3](https://m.media-amazon.com/images/I/71+pdVb5-+L.jpg) ![Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm - Image 4](https://m.media-amazon.com/images/I/71ExXeRhoTL.jpg) ## Questions & Answers **Q: How is this fitted into a clay soil pipe in my front lawn. Is there a chamber for it? Thanks.** A: This will not fit an old clay pipe which are 4inch (slightly smaller) this is for new 110mm plastic pipe **Q: Can this be installed vertically? I am unable to access the manhole as this has been concreted over** A: Not suitable for vertical installation, please enter B00VIE67EK in Amazon search bar for a 110mm vertical non return valve, please check to dee if this is suitable **Q: Is this roddable** A: No the valve cannot be installed upside down. It is a swing flap valve. Therefore when installed horizontally it cannot be rotated **Q: Is this easy to fit into an existing clay ground pipe? Thanks.** A: No 110mm plastic pipe only ## Frequently Bought Together - Horizontal PVC Plastic Sewage Drain Check Non-Return Valve Backwater Prevented 110mm - 110mm Non Return Valve Backflow DN110 Single Stainless Steel Flap Valve --- ## 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.co.uk/products/49023844-horizontal-pvc-plastic-sewage-drain-check-non-return-valve-backwater](https://www.desertcart.co.uk/products/49023844-horizontal-pvc-plastic-sewage-drain-check-non-return-valve-backwater) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-17*