Water heaters, toilets, and drain lines are not replaced during a repipe, though your plumber can add these services if you need them.

If your pipes have been experiencing clogs, poor water pressure, frequent leaks, corrosion, and rust-colored water, or if your home is over 40 years old, consider repiping your house.

"New plumbing" could simply just mean new plumbing fixtures and not necessarily a new copper or pex re-pipe of the home. Plumbing supply lines - old are typically galvanized which have the potential to leak or burst. New re-pipes are done in copper or pex.