Interior plumbing continues for a second day with the addition of some of the more recognizable fixtures for the laundry room and hot-water tank in the garage.   The Plumbing is also vented through the roof as appropriate to prevent the back-up of gasses and prevent a vacuum from forming inside the pipes, causing water flow problems.  Pipe “traps” are also put in place as a water-lock to prevent gasses and sewage smells from coming back up the drains, as well as a point to collect items that may have accidentally gone down the drain.