Tie In to Cast-Iron Pipe With PVC | No-hub couplings make it easy to tie in to existing cast-iron drain/waste/vent lines with new PVC. Here's how to do it: | By Fine
Series 732 Transition for Ductile Iron Size PVC/HDPE - Poly-Cam, Inc.®
Butler Supply | Fernco|3000-22|018578015807
3000-55 - Fernco 3000-55 - 5" x 5" ProFlex Coupling (Cast Iron to PVC, Steel, Extra-Heavy Cast Iron)
Amazon.com: 2" x 1.5" ProFlex Coupling (Cast Iron, PVC, Steel to Tubular) : Industrial & Scientific
DUCTILE IRON TRANSITION ADAPTERS
Model #212 | Ductile Iron Couplings | Connection Fittings
Fernco 1056-42 4-in. x 2-in. Flexible PVC Pipe Coupling for Cast Iron and Plastic Plumbing Connections, 2-Pack - Amazon.com
Fernco 4-in Schedule 40 PVC Compression Coupling in the PVC Pipe & Fittings department at Lowes.com
How to transition from cast iron to PVC for tub drain? : r/Plumbing
The Plumber's Choice Shielded 3 in. Steel Transition Coupling Connects Plastic or Extra Heavy Cast Iron to Copper H-38225 - The Home Depot