Hi folks, a quick question. Today I just saw a lavatory cistern that
had a strange flushing mechanism (well it was strange to me anyway, I
hadn't seen one before). There was push button to flush the toilet,
and I had a peep at it as far as I could, and saw it had a sort of
plastic tube that connected to the flushing mechanism somehow. It seems
as if pushing the button would just push some air down the tube and
start the flush. Any idea how this works?

I wasn't able to see inside the cistern, but I wonder if this type of
flushing mechanism is reliable, i.e. do they experience any particular
problems compared to the "traditional" syphon flush?

I'm interested because I hope soon to do up our bathroom so I will be
looking to replace everything, including the lavatory cistern etc. and
I'd be interested in this type of flush if they're any good.

Any experience or advice on this type of flush, vs. the "traditional"
type, would be welcome.

TIA

Flummoxed