Our building is part of a campus with a central utility plant which delivers domestic hot and cold water (along with heating hot/cold water).  The best/only opportunity to meter process water in the building would be the dishwasher.  The credit reads "for two or more of the following water subsystems," so would this credit be achieved if we meter the DHW (full building) and dishwasher?  Because DHW and DCW come from the central plant, they are required by prerequisite to be metered. So would metering DHW count toward both prerequisite and credit?