Plumbing pictures

Some pictures of the new plumbing.  It is now complete and ready for inspection. We have all new copper water pipes and PVC waste/vent pipes in the entire house except for a bit that runs into the downstairs bathroom.  But that is newer. One great thing is the plumbers installed a new master water cut of switch. The old one was, well, old and we didn't trust it to remain off if we ever needed to shut down the water. 

The first photo is the bathroom floor.  Looks like a mess but it all makes sense. I'm wondering if i should insulate the hot water pipe. 

The second photo is the kitchen wall and you can see the bathroom to the right. The kitchen wall has been made thicker to match up with the new SIP wall. 

The last photo is the utility room.  Here the main waste stack pipe ties into the old cast iron pipe that runs under the house.  It is alone this wall that we'll put the sink, washer and dryer.