In an earlier contribution to this discussion,
Timothy Murphy wrote:

My fairly ancient cistern seems to have failed -
it only flushes when the water level is dangerously high.
This is a low-leve cistern, sitting on the toilet bowl.

I was wondering if there are any clever units now
which one can use as replacements?
(I don't really want to replace the whole unit.)

I'm thinking of something that has 2 (or more)
levels of flushing, to save water.

Also, can anyone point to simple d-i-y instructions
for replacing the inside unit?

Sounds like you need a new syphon unit. Have a look at
http://tinyurl.com/crk4b which would probably do the job.

It simply connects to the big hole in the bottom of the cistern, using its
flange, rubber seal and nut - and the flushing mechanism connects to the
wire hook, so as to raise the piston when you operate the handle.

You will, of course, have to turn off the water, disconnect the cold feed
and overflow pipes and disconnect the cistern from the pan to fit it.

I'm not quite sure whether your cistern is close-coupled (i.e. sits directly
on top of the pan) or low-level (i.e. mounted a little way above the pan
with a J-shaped pipe connecting the cistern to the pan. Which is it -
because the detailed instructions are slightly different in the two cases?
--
Cheers,
Set Square
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