NDS 1520-20 2" PVC Ips S by S Swing Check Valve No metallic parts, corrosion resistant ant compression style for ips sized plastic or metal pipe Connections: 2-inch slip by 2-inch slip Angle seat and weighted flapper designed for low pressure seal Pressure rated 125 psi at 72 degrees F PVC weighted and shielded flapper will retail back pressure up to 125 psi