The 6" Service Weight Cast Iron Backwater Valve from Braxton Harris Co Inc is designed to prevent backflow in plumbing systems. Constructed from durable cast iron, this valve ensures long-lasting performance and reliability. With a 6" diameter, it is suitable for various plumbing applications, providing a secure seal to prevent water from flowing back into the system. This backwater valve meets industry standards for quality and safety, making it an essential component for both residential and commercial plumbing installations.