Use the Flo-Lock™ PVC Gripper Reducer Coupling, 1 in. SDR-9 CTS X 3/4 in. SDR-11 to connect pipes and help provide a leak-proof connection. This easy-fit coupling has one 1 in. SDR-9 CTS compression end and one 3/4 in. SDR-11 compression end to connect pipe and can form a leak-proof joint with less chance of pull-out when properly installed. Helps prevent costly property damage, pipe corrosion, and system issues. Durable gripper coupling is made of PVC plastic. Gripper is made of steel. O-Ring is made of EPDM. Use fittings and other valves to set up a new irrigation system, expand an existing system, or make repairs.