While pressure balanced shower valves use changes in water pressure and temperature to balance the shower temperature. Thermostatic shower valves control the water temperature. Thermostatic shower valves offer a distinct advantage because the temperature will not change throughout the duration of the shower. Thermostatic shower valves let you pre-set the water temperature. This ensures that water doesn't get hotter or colder than you want, while still allowing each individual to adjust the water temperature . Thermostatic Shower Mixer Valve Pre-selecting a water temperature also conserves water, making it an environmentally-friendly option. A thermostatic shower valve can handle a wide range of shower applications due to its high flow rate. Two handles control the thermostatic valves: one controls the volume and one controls the water temperature. The thermostatic valves respond to temperature and not pressure. This valve allows you to adjust the flow volume while shavin