I've got a toilet with the cistern (one of those fairly narrow, back to front, black ones, Plumb Centre I think) concealed behind a tiled partition. Needless to say the builder, 20 years or so ago, didn't allow for access other than from the shelf above! The syphon is starting to play up and probably needs replacing, and it's fixed at the bottom of the cistern, so I'm going to have to cut out a panel around the joints in the tiles to get access.
Question is can I get a replacement syphon that's removable from above, to avoid this hassle in the future? Preferably one with a built in overflow that discharges via the pan.