To repair, replace, or mend a three-valve and two-valve shower diverter requires removing the shower controlling handle first. The next step is to push the sleeve up the diverter. With the help socket wrench, raise the diverter gate/valve. For the correct replacement, take the removed diverter valve to the plumbing store. Therefore, you will get the right one. After that, reverse the above steps for the installation of the new one.