Push button flush sticking

[Kton2002]

Hi all, got a push button flush that was stuck, slow trickle into pan. It is a concealed toilet but has plastic cistern that is slightly accessible. Took cover plate off and couid unfree flush valve by pushing a black lever which is just visible in the photo at the back, back down. Works OK now, but is it best to put new flush valve in, or would a new button and cable work? It is just getting slightly stuck I think not sure if cable is vacuum operated and is sticking.

 

[HERTS P&D]

Pour in 1 lite of lime scale remover into the cistern and leave over night.

Andy

 

[Kton2002]

Thanks Andy, is it likely its just scaled up and causing the flush to stick on the rough limescale?

 

[Kton2002]

Also should I flush cistern first and tie up the Inlet valve to stop it filling up with water whilst it soaks? Thx again

 

[HERTS P&D]

No, just pour it in when full and leave over night.

Andy

 

[Kton2002]

Does anyone know if i can just unscrew this flush valve and buy a new one to put back in? Looks like it might sit into some form of collar and it would unscrew a cm or so and be able to be lifted out?