Geberit provides reliable, discreet behind-the-wall solutions that ensure perfect functionality, outstanding convenience and maximum durability. The flush buttons are the only part of the concealed cistern the user can see. A variety of flushing systems are available, making it possible to find the right product for a particular application or special structural conditions. To make it easier to match the Geberit flush button with the appropriate cisterns, they are each given a “family name” that they share with the cisterns: Sigma, Omega or Kappa.