How to really fix a caroma dual flush leaking toilet

Caroma model here but the principals are the same. There’s a washer that needs to be put on properly.

[porsche]

You sir are a saint, I'm here with new seals at 9 pm pulling my hair out about the replace the entire toilet and I've come across your video and given this a go and it's fixed it

[richardnorton-hall]

Brilliant! I had replaced the washer and re-seated but toilet carried on leaking. This video gave me the answer. Thank you so much!