Twin handle shower valves, alternatively known as dual handle shower valves, are used to control the flow and temperature of the water separately. However, some shower valves include a diverter, designed to allow the water to exit between different outlets, including a shower head, a shower handset, body jets and the bath. One handle will control both the temperature and flow, and the other handle will control the outlet. There are many stylish handle designs available including lever, crosshead, knob and square. We recommend the ABS Round Bar Shower Valve, suitable for use with a slide rail kit and designed by Premier.