Based on this product's specifications, here are some alternatives and similar models
AGAflex pipe fitting IK coupling 1 and 1/4" female thread (model 10020004)
Summary description:
AGAflex IK coupling with 1 and 1/4" female (internal) thread, model 10020004. A pipe fitting designed to join sections of piping or connect hoses and threaded components with a 1¼" internal thread. Suitable for plumbing and fluid installations where a female-threaded coupling is required. Provides a straightforward mechanical connection for repair, replacement or extension tasks.