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my derwent macadee flush will only work by quick succession flushing?

My Derwent Macadee flush will only work by depressing the flush lever a number of times in quick succession, and it seems to be getting worse.
Tony brickie., January 2009
Its a indication that the piece of rubber diaphragm has torn up. Its time to change it. You will need to open it up.
You could use a plastic sheet ( transparency sheet will be fine) and cut it out to the required shape.
Make sure its of the same size of the original. Alternatively you could buy the diaphragm for a few dollars.

You will have to take a look into the cistern and figure out how to dismantle and get to the diaphragm.

Good luck

@ma, January 2009