Taking people to court over a plumming 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.

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.

It’s easier to just not toss crap down the drain that has no business being there. I’m almost 40 and so far I still have to make my first call to a plumber over a clog.