Taking people to court over a plumbing bill is not a thing here. And even if you make a point of not paying it they’ll just take it out of your deposit and then it’s you that’ll have to fight them over those 200 bucks or so. Who has time for that crap.

Also the practicality of it. Blaming previous tennants might fly if you’ve just started living there, but there’s no way that is a reasonable defense after two years.