I have had two of these things:
One worked for a while and then started leaking.
Bought another (not realising it was under warranty) and despite multiple efforts to install it, I can't stop it leaking.
It leaks where the metal textured ring meets the black plastic. There was an clear O ring in the packaging but no way can I get that attached with that in there.
I feel a bit dumb, but hopefully, someone will have a quick idea.