How to fix this toilet flush?

[M_K]

Hi,

Please see attached photos.

This toilet doesn't flush with the button, but works fine when you manually push the syphon down.
I can find tubes like these from plumbing shops, but I am not certain that alone would fix the problem. I think the bit lower down, connecting to the syphon may also need changing.

Could someone assist me with what this part is called, and where I can find one? Also, if anyone thinks my troubleshooting of the issue is incorrect, please let me know.

Thanks

 

[jj4091]

Do you mean the bellows https://plumbinbits.co.uk/product/grohe-adagio-valve-bellow-43506000/

 

[M_K]

That's the one - thank you!

(Blimey that is expensive for a rubbish piece of plastic!)

 

[ChrisJP]

At the risk of being pedantic, your flush is not via a siphon but instead is by the bellows operated flush valve, which is effectively just a flap at the bottom of the cistern which opens to flush and closes again to allow the cistern to refill.

 

[M_K]

Thank you for correcting me.