Hi everyone. Hopefully, this is an interesting post. The main question: should I just add a cleanout or replace the p-trap? Other questions: What adapter would I look for to connect the PVC to the iron wye? Any hints on snaking that I'm missing? I have a slow-draining washing machine drain and I've tried snaking the drain but can't get the snake past (or into) the trap. There's no clean-out closer to the trap, either. [b]I've torn open the wall and this is what I have:[/b] [attach]110855[/attach] I think I want to remove the plumbing marked in red and replace it with something along the lines of the green lines with PVC and a trap that can be dismantled, and leaving an access panel when done. I would leave the wye (marked in yellow) but need some kind of gasket/adapter to connect the PVC to it. An alternative would be to put in a cleanout near the trap but that would be more PVC mixed with cast iron pipe, which seems to not be the best solution. Any and all opinions/options would be greatly appreciated.

I am renovating my bathroom in a 1939 home in Maryland. Coming from the basement, I have a cast iron vent stack. I have one bathroom tying into this stack on the 2nd floor. The toilet is right next to the stack and all the plumbing for this is cast iron. This Y's off and runs to the tub/sink/vent on the other side of the room. All the plumbing here appears to be galvanized (see photos) I would like to take out everything back to the vent stack -- just trying to figure out what that work entails. Thanks!