I have a condo and want to add a stackable washer/dryer next to the bathroom. I plan to split the hot and cold water outlet to share with the washer and also add a Y to the drain for the washing machine.
I was told, over the phone, by a local plumbing company that this would not work because my bathroom drain was to small to for current washing machine pumps. They want to tear into my bathroom wall and change all the drain pipes to a larger diameter.
A friend of mine who has some plumbing experience said I would be fine with the drain I have.