Re: Halfbath to laundry room
I would suspect you would use the plumbing from the sink ----Just make sure you have at least 1 1/2 inch drain line for the washer.
The toilet drain will need to be properly capped.
However, you maybe required by code to have a floor drain for your laundry room . Depending on your local code you may need a 1 1/2 or 2 inch in which case you can install a reducer and "P " trap and convert the toilet drain.
Just a thought.
"" an ounce of perception -- a pound of obscure "