It really doesn't matter about the make or model, chances are the syphon is on it's way out,they are a generic part bought off the shelf for about a tenner.Have a look at the type,take a picture, if you have a tape measure, measure the height from the bottom of the tank to the top of the syphon (they vary some 9" some 91/2" if I remember right-the lid won't go on with the taller one) any DIY sells them, then follow the instructions on the packet and replace it.Good luck,it is a straight forward replacement.
Rich t
August 2014