Developers / Water supply - water mains

1. How do I get the water mains for my development laid?
2. How can I get my property connected to the mains supply and/or sewerage system?
3. How do I get my water supply turned back on after having it disconnected?
4. Can I divert a water main?
5. How do I separate a shared water supply?
6. Can I divert a surface water drain?