I had a problem with the flush handle not returning on a 20 year old close coupled cistern. I renewed the syphon assembly and the thick rubber ring that sits between the cistern and the toilet pan - the old one was perished.
All was well for a couple of weeks but now every time it is flushed a small quantity of water (perhaps a few teaspoons full) leaks from the joint between the cistern and pan.
I've never done this before. It's a bit of a faff taking it all apart again so before I do, does anybody have any idea what I might have done wrong? Should I have put some kind of silicone grease on the rubber ring? or do they come in different sizes? in which case I might have the wrong size.
TIA
Steve