Spears Schedule 40 PVC Coupling (Socket) Nesting connections. Designed to join two sections of PVC pipe in pressure piping systems while maintaining smooth, reliable flow performance. Made from durable, corrosion-resistant PVC for long service life. Manufactured to ASTM D1784 standards, NSF/ANSI 14 and 61 certified, and compliant with CSA B137.6. Ideal for industrial, commercial, plumbing, and irrigation applications.