We were dispatched from SYD to LAX with one of the three lavatory waste tanks inop on a 777.
About 4 hours remaining in the flight, a few lavatories started shutting down because the two functioning waste tanks were reaching their capacity.
Luckily, we made it to LAX without further incident, however, it almost caused us to divert into HNL to have the lav tanks serviced.
Talk about an expensive pee break!