I guess you didn't understand what I posted in post #10. It may not make any difference that you have a condo situation.
If you are connected to a public water system, then there would be an ordinance for the city you live in. Did you look it up or not?
The engineer you spoke to is not an attorney for the city. He doesn't get to decide what the law says. If your city has an ordinance that says every dwelling on the public water system must have their own meter then you can compel your neighbor to pay for it. I'm not talking about a split. I'm saying that your neighbor will have to install a line from the public main to his house.
Do you understand that now?
Post your city and I'll find the ordinance for you.

