As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGECNY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PHL DUE TO POTABLE WATER SHOWS EMPTY ON FLIGHT ATTENDANTS PANEL. THE AIRCRAFT LANDED SAFELY AT PHL WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AIRFRAME NO WATER LEAK DETECTED AND SERVICED POTABLE WATER SYSTEM.