Fernco 1056-215 Reducing 2-in. x 1-1/2-in. Flexible PVC Pipe Coupling for Cast Iron and Plastic Plumbing Connections in Black - Pipe Fittings - Amazon.com
3001-22 - Fernco 3001-22 - 2" x 2" ProFlex Coupling (Cast Iron, PVC, Steel to Copper)
NIBCO 2 in. x 1-1/2 in. ABS DWV Hub x Hub Reducing Coupling C5801HD2112 - The Home Depot
Can I join ABS to PVC?
NIBCO 1-1/2 in. ABS DWV Spigot x Slip-Joint Trap Adapter C580127HD112 - The Home Depot