Charlotte Pipe 4 in. PVC DWV 90-Degree Hub x Hub Elbow PVC003001400HD - The Home Depot
NIBCO 4 in. x 4 in. x 1-1/2 in. PVC DWV 45-Degree All Hub Wye Fitting C4810HD44112 - The Home Depot
Uxcell 3/4 Inch Elbow Pipe Fittings UPVC 4 Way Side Outlet Cross Fittings Pipe Connector 2 Pack - Walmart.com
Amazon.com: NDS 4P02 PVC 90-Degree Elbow, X Hub solvent-weld connections, for Use with 4-Inch Sewer and Drain Pipes, White, 1 Count (Pack of 1) : Everything Else