![How should I connect PVC plumbing for two sinks to old cast iron stack with two threaded tees? - Home Improvement Stack Exchange How should I connect PVC plumbing for two sinks to old cast iron stack with two threaded tees? - Home Improvement Stack Exchange](https://i.stack.imgur.com/2CiXj.jpg)
How should I connect PVC plumbing for two sinks to old cast iron stack with two threaded tees? - Home Improvement Stack Exchange
![Wavin Optima coupling for connecting PVC pipe to cast-iron pipe, d 50 [Code number: 3043751 / 24326750] | Inrusstrade Wavin Optima coupling for connecting PVC pipe to cast-iron pipe, d 50 [Code number: 3043751 / 24326750] | Inrusstrade](https://inrusstrade.ru/system/products/photos/000/014/221/original/24326750-photo.jpg?1628517616)
Wavin Optima coupling for connecting PVC pipe to cast-iron pipe, d 50 [Code number: 3043751 / 24326750] | Inrusstrade
Connecting PVC to Cast Iron. Fernco likely will not fit... :( | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
![3000-44 - Fernco 3000-44 - 4" x 4" ProFlex Coupling (Cast Iron to PVC, Steel or Extra-Heavy Cast Iron) 3000-44 - Fernco 3000-44 - 4" x 4" ProFlex Coupling (Cast Iron to PVC, Steel or Extra-Heavy Cast Iron)](https://www.supplyhouse.com/images/products/zoom/3000-44-3.jpg)