This picture was taken while I was standing in the living room. Mike is standing in what will be the master bedroom.
This picture is in the guest bathroom. They have installed the tub and the plumbing lines for the sink and toilet.
This is part of the HVAC system (Heating, Ventilation, Air Condition). These tubes run to all the vents in each room in the house. Once the house is complete, they do a pressure test to make sure that all the rooms are cooled and heated equally.