Siamp branded replacement 2" outlet mechanical dual flush Optima 49 Flush valve. Capable of a full 6 ltr flush volume or a reduced variable amount depending on settings. Comes complete with installation instructions and dual flush 38mm shiny chrome coloured flush button.
Fits cisterns with a hieght between 320mm and 420mm with a hole of around 63mm in the bottom of the cistern and a hole of between 38mm and 45mm.
If your cistern has a hole of 49mm to around 55mm in the bottom then you can purchase a 48mm basket which will allow the valve to fit. (CLICK HERE FOR 48MM BASKET).
This basket takes the Siamp flush valve but has a smaller thread size which makes it compatible with cisterns that have a smaller than standard hole in the bottom. Normal size is 63mm but if your cistern has a hole between 49 and 56mm diameter in the bottom and a height of between 320mm and 420mm then you can use this basket in conjunction with a Siamp flush valve (CLICK HERE FOR FLUSH VALVE).
Note, this is only an option if the hole in the top of your cistern is between 39mm and 45mm and is directly above the bottom hole.