The diaphragm in my toilet has split, but Plumb Centre dont have a replacement, and their complete syphon is too big to fit my fairly small cistern.
I have done a temporary repair by fitting a bit of plastic sheet on top of the existing split one, but where might I get either a complete syphon or a diaphragm to replace the old one? The syphon is marked 'Ideal Standard' and 'Jetflow', and the existing diaphragm is held in place by an upside-down conical plastic fitting that doesn't seem to be removeable.