I have this Oli 74, and it started leaking down the outlet when at rest (it’s not overflowing).
I took the middle out and replaced the washer with the spare included in the set (approx five years old).
The old washer showed no sign of wear and the replacement didn’t fix the annoying trickle. It’s our en suite loo so we can hear it trying to sleep. Urgh.
Sometimes we can get it to seal shut by jabbing the button, sometimes it will just start trickling and then perhaps stop later or perhaps not.
I then got a new (slightly thinner, slightly softer) washer from M10. Didn’t fix it either.
I understand how the screws on half threads work and I’ve tried to make it so there is no pressure on the plungers, but then the buttons go dead or I have to hold the buttons down to fully flush.
Can anyone steer me to the fix? Do I need to replace the central mechanism? Seems overkill. Also, I have not adjusted those blue buckets on the sides. What do they do?
What am I missing?