1、[Threaded to Clamp Hose Adapter] These adapters feature 2.25 inch inner diameter threaded collar for connecting NPT hose connectors to clamp style hoses. 2、[Reliable Connection] This pool hose adapter kit is perfect for older hoses without adapters, also come with washers for a more waterproof connection. 3、[Wide Application] Suitable for pool set with 1.5 and 1.25 inch hose, as well as 4000, 2500, 2000, and 1500 GPH filtration pumps, ensuring versatile compatibility for various pool systems. 4、[Versatile Use] The adapter is also suitable for Cl generators and salt systems, with standard size for Cl generator, feeders and salt cell systems, allowing you to utilize existing hoses. 5、[Secure Connection] The PVC construction of the hose adapters ensures a reliable connection, providing peace of mind and durability for pool maintenance.