Plumbers have been working this week, and should have the water system ready to test today. The big issue has been some of the drain piping that didn't conform to code and had to be reworked. For example, on another MSI house on Chestnut St, the drain lines used normal 90-degree elbows, but our code calls for large-radius elbows. So our plumbing inspector had us take out three ceilings to look for the same problem. In this case, MSI did use large-radius elbows, so there's no problem - except for the cost of repairing the ceiling, which we'll have to argue about.
Plumbers will move on to hydronic heating system next week, and the electrician will be in to finish wiring. We'll get our water pipe on April 21, then we can get electrical service.
All in all, we're looking good, and the only schedule uncertainty is the gas line.