Re: convert old master closet into a laundry room
Yes, it is possible, but it's not as easy as just tapping into the vanity drains. The biggest problem is that the vanity drains are smaller than what the laundry drain should be. I believe there is also an issue with having other fixtures plumbed into the laundry drain, it has to be it's own entity.
What I would recommend is consulting with both an electrician and a plumber to come and assess the needs of the laundry room and give you estimates on what it will take to do the job. It can be done, but not quite as easily as you're thinking.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!