As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORT WATER LEAKING IN FWD LAV AND SEEPING INTO FIRST CLASS. WATER LEAKING FROM FWD LAV CHECK FWD LAV FOR LEAKS CHECK WATER HEATER AND PLUMING SUSPECT THE DIAPHRAGM IS CAUSING THE LEAK DRAIN VALVE SUSPECTED TO BE FAILING. REMOVED AND REPLACED FWD LAV DRAIN VALVE. OPS CHECK, LEAK CHECK GOOD.