3/4 x 3/4 Inch Push To Connect Male NPT Threaded Adapter Fitting Connector for PEX, Copper, CPVC Pipe, Brass Plumbing Fitting with Stiffener, No Lead - Walmart.com
4" Schedule 80 CPVC Pipe PD-800-040C - 5ft.
Charlotte Pipe 3/4 in. IPS x 3/4 in. CPVC CTS Transition Bushing CTS02100I0600HD - The Home Depot