1" White Schedule 40 PVC Check Valve. Solvent Weld prevents backflow of water in plumbing systems. Made of durable PVC, this check valve features a stainless steel spring loaded PVC poppet with a neoprene seal, ensuring a secure and tight seal. With a pressure rating of 200 psi at 72 degrees Fahrenheit and compliance with ANSI B2.1 standards, you can trust this valve to perform efficiently. Designed for use with water only, this check valve is not suitable for compressed air applications.