"N Cook" wrote in message
...

Seemed a neat idea for making a 2-level flush from an old simple flush
mechanism.
Pass a brass rod through the cuistern lid , located onto the ball of the
float valve.
Then add a weight to the brass to depress the float more, for more water,
until the excess weight is balanced off. Remove the weight for cheap-skate
flush.

But you'd have to wait for it to fill for a full flush, wouldn't you?

One simple dual-flush mechanism works by having a 'syphon breaker' hole in
the side of the syphon, which is obstructed by the flush valve if you hold
onto the handle.

Have you considered doing something like that, which would only require
drilling a hole in the side of the syphon?

W