I'm about to replace my toilet. The old cistern (Italian, expensive,
20 years old) had a little tube inside that meant it refilled
underwater, rather than pouring water into the tank as most toilets do.
**Much** quieter.

None of the toilets I've looked at recently seem to have this feature.
Do they still exist, or have they been banned by building regs etc?
Does anyone know where I can get one?

Many thanks,

Chris