On Fri, 1 Apr 2005 16:38:30 +0100, "Uno Hoo!"
wrote:

When my syphon membrane failed recently I took the opportunity to completely
replace the syphon with one of these 'flip-flop' valves. The flush handle is
replaced with a button and the button operates a lever that simply lifts a
hinged 'lid' over the flush pipe. The kit (from B&Q) came complete with new
ball valve mechanism - which of course is no longer a ball valve! The new
device works perfectly - the flush is better and the cistern re-fill is
almost silent because it refills from the bottom (underwater!). Highly
recommended.

I tried one of these, but the pushbutton unit was so close to the top
of the cistern that the lid, which has a flange which fits into the
cistern, fouled on it. Best check that one of these will fit your
cistern first.