How do I install "city" or "shore" water

Hello, I'm installing all new plumbing in my '64 Globetrotter, and am a brand new first timer. I read a recent helpful thread where someone posted that you can hook up water pressure from an outside line like at your house. What are the parts I need and what are they called so I know what to ask for? And where is this water-in installed in the line? Does water-in go between the water heater and the on demand pump?



And, while I'm at it, where does the freeze drain for the system go?

Thanks!



Jeff