how to remove gray flush washer on a roca dual flush cistern?

how do i install the new roca dual flush toilet tank macanasim?

Roca toilet float system doesn't drop after flushing?

My roca toilet buttons ?

How do I get the top off my Roca dual flush W/C?

Securing Roca toilet seat?

dual flush toilet 6L, 3L, roca cistern flush valve?

How can I tighten a loose toilet seat?

how do i get the top lid off a duel flush roca?

How can I replace seal under the cistern on Roca Giralda toilet?

How can I fix a water leak between the cistern and toilet pan when flushing?

ROCA flush valve--?

try to remove a roca to to toilet seat?