My house has an upstairs bath and nothing downstairs. i would like to install a 2 pc bath in the laudry room off the kitchen. house is about
60 yrs old, has a foundation but no basement, and possibly a small crawl space underneath (not sure). Soil stack is about 20-25 ft away from laundry area. how do i go about tapping into this stack to add drains and the like for a new bath? What is involved and should I just call a plumber?