The 3" Sch 40 PVC Backwater Valve with an 18" Plastic Access Sleeve is designed to prevent backflow in plumbing systems. This valve is constructed from high-quality PVC, ensuring resistance to corrosion and chemical damage. The 3" diameter allows for efficient flow management, while the included access sleeve facilitates easy maintenance and inspection. This backwater valve meets industry standards for safety and reliability, making it an essential component for residential and commercial plumbing systems.