I'm working on a project where the plumbing engineer is providing a main water meter at the building entrance and one submeter at the hot water system. We have standard plumbing fixtures (restrooms, etc), a boiler system and dishwasher on this project. It is my interpretation that, because there are multiple subsystems on the project, that the main water meter does NOT count towards 1 of the 2 required submeters, since deducting the hot water still leaves the plumbing fixtures, boiler and dishwasher on the one meter.

My question is: is the credit met with the main water meter and the hot water meter, or is another meter required (at either the boilers or dishwasher)?