The 4" Backwater Valve Flapper with Seal from Braxton Harris is an essential plumbing component designed to prevent backflow in drainage systems. Constructed from durable materials, this flapper ensures reliable performance and longevity. The 4" size is compatible with standard backwater valves, making it easy to install as a replacement or upgrade. The included seal enhances the effectiveness of the valve, ensuring a tight fit and preventing leaks. This product is ideal for both residential and commercial applications, providing peace of mind against backflow issues.