Flange seal with integrated antibackflow check valve — designed to stop sewer odors and prevent sewage backflow while providing durable, corrosionresistant performance for standard home toilets. Key benefits Eliminates sewer odors: The flange seal fits between the toilet seat and pipe to block sewer gases and stop odors from spreading into the bathroom. Prevents backflow incidents: Builtin antibackflow check valve stops sewage from flowing back into the toilet, reducing the risk of contamination and embarrassing backups. Lasts longer in wet conditions: Made from thickened, anticorrosion material that resists water damage and wear, extending service life and reducing replacement frequency. Easy, worry fit: Universal design works with most standard toilets so you can install it without complex sizing checks — suited for regular home toilet installations. What makes it stand out Combined sealing and valve function: Acts both as a reliable flange seal and a check valve, solving two common problems with a single part. Robust material choice: Thickened construction delivers stronger seal integrity and better resistance to corrosion and degradation from constant water exposure. Simple compatibility: Designed for standard residential toilet setups, so it fits typical flanges and pipe connections used in homes. Practical applications Home bathrooms: Install on any standard residential toilet to eliminate intermittent sewer odors and prevent backflow after drain blockages. Basements and lowerlevel fixtures: Ideal where negative pressure or adjacent drains can cause odors or occasional sewage into the toilet. Older plumbing or intermittent use bathrooms: Useful for vacation homes, guest bathrooms, or older systems where seals have worn and backflow risks are higher. What you get A thickened, anticorrosion flange seal that fits standard toiletseattopipe connections An integrated antibackflow check valve to stop sewage from reentering the toilet Reduced odors and improved sanitary performance without the need for detailed size measurements Installation note Designed for standard home toilet installation scenarios; fits most fixtures without specialized sizing. Follow usual toilet removal and reseating steps for replacement.