SharkBite 3/8-in PEX (1/2-in O.D) x 1/2-in NPSM Brass Female Swivel 90-Degree Elbow in the PEX Pipe, Fittings & Specialty Tools department at Lowes.com
25-pk) 1/2" 90 Elbow-Poly- Pex-A F1960 Expansion Type-Alco Brand- For Expansion Type A Pex (Requires Expansion Tool and Rings-NOT INCLUDED) - Amazon.com
SharkBite 1/2-in PEX Crimp x 1/2-in FNPT Brass 90-Degree Elbow in the PEX Pipe, Fittings & Specialty Tools department at Lowes.com