VFAUOSIT Brass Pipe Fitting, Water Hose Adapter, 3/8 inch Male x 1/2 inch Female water pipe adapter 3/8 to 1/2 pipe adapter Reducer Adapter 2 Pieces - - Amazon.com
Charlotte Pipe 1-1/2-in PVC DWV Female Trap Adapter in the PVC DWV Pipe & Fittings department at Lowes.com