The Hayward RPV1400FPV1 is a 4-inch PVC pressure relief valve designed for reliable performance in various applications. This valve operates within a pressure range of 10-150 psi, making it suitable for a wide range of systems. Constructed from high-quality PVC, it features a PTFE FPM diaphragm for enhanced durability and chemical resistance. The valve is equipped with flanged ends for easy installation and compatibility with existing piping systems. Ideal for industrial and commercial use, this valve meets industry standards for safety and reliability.