The 3" Sch 40 PVC Backwater Valve is designed to prevent backflow in plumbing systems, featuring an 18" plastic access sleeve for easy maintenance. This valve is constructed from high-quality PVC, ensuring resistance to corrosion and chemical damage. The included plastic lid provides a secure seal, enhancing the valve's effectiveness in preventing unwanted backflow. Ideal for residential and commercial applications, this backwater valve meets industry standards for performance and reliability, making it a crucial component in any plumbing system.