As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM EWR TO PHX ALL FOUR LAVATORIES BECAME INOPERATIVE, DIVERTED TO ORD. SERVICING PERSONNEL SERVICED LAVATORIES AND DRAINED SYSTEM; RESET CIRCUIT BREAKERS FOR LAVATORY VACUUM SYSTEM, AND CLEARED BLOCKAGE FROM FORWARD LAVATORY; OPERATIONAL CHECK OF FORWARD AND AFT LAVATORIES GOOD. FLIGHT CONTINUED TO PHX WITHOUT FURTHER INTERRUPTION.