high-level cistern

When I want to flush the toilet multiple pulls of the chain is required and it is getting worse over the past few months. I was told that I need a new siphon. But as I know nothing about plumbing I don't know if this is true either so please excuse my ignorance. I do know it is old, I am...

I'd be grateful if anyone could help me work out what to do about the cold water feed when we replace our toilet. Currently we have a high-level toilet and the feed comes down from the ceiling. I would like to change the toilet to one with enclosed sides but I don't know if this would be...