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Toilet overfilling - How to Adjust this Particular Type of Toilet Fill Valve?

Posted: Wed Nov 27, 2019 9:20 pm
by Catwoman
Hello,
my toilet started overfilling tonight and when I lifted the top I encountered a type of fill valve I have never seen before. I also don't find it on the internet and can't see how to adjust it.
Normally, there is a little screw or something that one can adjust. And here nothing.
Does anyone know what to do? I don't have time to get a plumber in right now.
Thanks for any suggestions!