toilet making a noise

[ajoint]

my toilet makes a rather loud noise only sometimes when it is flushed?could it be the diaphragm washer or the filler valve.thanks ajoint

 

[JCplumb]

yes 🙂

 

[Skelly87]

Sounds like water hammer caused by that diaphragm washer

 

[PETE 123]

Does it make a noise when you sit on it

 

[ajoint]

yes 🙂

,do you reply with yes it is the diaphragm ?

 

[ajoint]

no,it does do it when you sit on the toilet,only when i flush it sometimes,thanks,ajoint

 

[JCplumb]

Yes to both suggestions. Impossible to say without looking at it. If it's a new issue I'd start by replacing the float operated valve completely. Some people prefer to fix the valve, I prefer to replace with a known good brand like fluidmaster.