Use the 1 in. PVC Union Sch. 40 S X S to make a leak-resistant connection between pipes, no glue necessary. This easy-fit coupling has two slip ends that slide onto 1 in. Sch. 40 pipe ends. Union is NSF/ANSI 61+372 and UPC listed. The union fitting provides a corrosion-free connection and prevents costly property damage. Durable fitting is made of PVC plastic. EPDM O-ring in the center of union seals pipe connection point.