Toilet keeps running

MaudL

Hi,
Photos attached.
I've done a search on past threads but I'm at a loss because of my utter lack of plumbing knowledge combined with the fact that the inside of my cistern doesn't look like any of the pictures I've seen...
So, at first after flushing the cistern would refill very slowly. A few weeks later, it started refilling at normal speed but there would be a constant trickle of water coming out of the top of that white vertical stick thing on the right.
Now that trickle is more like a stream, it's quite noisy and an awful waste of water.

Is that something I can fix myself or should I call a plumber?
It's in an apartment, not a house, on the 2nd of 3 floors, if it matters.
Thanks!

K.Flyer

The diaphragm rubber inside the filling valve needs to be replaced.
The make of the valve is Torbek.
The water needs to be isolated, the large blue nut unscrews the outer assembly and the rubber is in there.
There is also a filter in the same place which could probably do with a clean.
They are one of the fiddliest ones to change, as you have to get a thin locating pin in through a narrow opening on the diaphragm.

MaudL

Thank you so much for your help!
Sounds like I should probably get professional help...