The scenario is an older condo complex (one big building split up into several units) with separate meters and services on each unit. All the meters connect to a couple common service drops. These do not have appear to have separate water meters, but a common pipe running to all units. Currently a #6 hits the water pipe right by the panel. If I upgrade the service do I have to go back to the main water meter which I can't even find? Which code articles apply.