Replacing Aerator in Hansgrohe faucet 

Thank you Thank you Thank you! This has been driving me nuts. Needed to go.

That part is the "non return valve". Mine is clogged, causing very low water pressure, and I can't get the valve out

Mate absolute legend

I have been trying to find the part number too

Do you see a gap between the pull down and the rest of the faucet?

Except, that's not an aerator.

Thanks. Do you know the part number.