Very disappointed in this episode and the direction the show is headed. If you watch old episodes there is more focus on how things are built or fixed. Also focus on the correct way to do things. This episode skips over all the details of building. It is becoming just another fixerup tv show where you show the before, some shots of work being done, and then the finished project. You need to remember your roots of teaching homeowners the correct way to do things, even if they hire contractors to do the work. Your show has been successful for 40 years because you have always stuck to the same core values. It looks as though you are throwing them away to be just like every other show.
Turn off the main water supply to the house, and in a convenient location, cut the hot and cold water supply pipes for the bathroom. Also cut out and remove all the existing water lines and fittings in the bathroom. Finally, cut out and remove the vent section leading to the sink and the main stack 5 in. below the vent tee. Stuff rags into open drain lines to keep sewer gas out of the house.