Flair-It 3/4" CUx3/4" CU Transition Fitting, designed to transition from copper to PEX, copper to copper, CPVC to PEX, CPVC to copper, CPVC to CPVC, or PEX to PEX. Made from durable polyoxymethylene (POM) and compatible with PEX and PB, this fitting boasts a patented design consisting of a nut and flared insert, eliminating the need for tools. It effortlessly pushes against the ID and OD of the pipe, ensuring a strong and long-lasting seal.