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
Flair-It PEX Pipe Tee, 3/8 x 3/8 x 3/8 In. | Brinkmann Hardware
Amazon.com: Oxygen Barrier Pex Tubing 3/8 Inch x 300 Ft Pex Tube Coil, Pex-B Pipe for Hydronic Randiant Floor Heating, 3/8" Pex Flexible Water Tubing, Red Pex Tubing : Everything Else
Apollo 3/8 in. x 5 ft. White PEX-B Pipe APPW538 - The Home Depot