Here you can order all parts for the Doeco Royal Billy Profi 45300.
This faucet is also called
Nobili 45300
MK45300C
You need to loosen it in the following way:
You need to unscrew the ring (NR 13 on the faucet parts drawing) from the bottom.
After this, you can lower the part which is inside the housing (on the drawing between NR1 and NR 12) and you can change the rings.
You should use a steel hammer to give a few taps against the bottom. then nothing will be damaged and it may be that it jerks and comes loose.
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