Dual Flush - 3 Adjustment Sliders

[Kipperthedog]

Hi,

I have a Dual Flush toilet siphon. It has 3 adjustment sliders on - not the usual 2. Two large ones on each side and a smaller one on the bottom. The two large sliders adjust the flush volume for the full and half flush. Any ideas what the smaller slider at the bottom is for? The toilet is an Ideal Standard.

Many thanks, Andy

 

[Ben-gee]

It switches between clockwise and anti-clockwise, so it can be sold in Southern Hemisphere.

 

[Ric2013]

Any photos?