Noisey toilet flush

[billybongo]

Would one of you kind people remind me why a toilet make a vibrating / humbing noise when flushed , its been ok for quite some time as in when installed .
cheers for any info , mark
ps as far as i know water pressure hasnt changed and no works have been carried out .

 

[Mikey456]

Diaphragm washer

 

[PlumbBobBob]

agree washer gone.

 

[kay-jay]

change the valve seat as well though cos they are often pitted by the time the washer goes

KJ

 

[Mikey456]

Yeah always good practice to change the orifice and fibre washer along with it.