in order to maintain the temperature in the thermostatic mixer as well as an adjustment of the larger amount of warm water that might be added at the user 39 s wish in order to modify the water temperature it should be kept in mind that the described embodiments of the fixed and movable plates are only examples which is why these plates can be given different physical forms that realize the same functions fig7 illustrates how the movable plate 9 of the deflector can be operated for example by means of a lever 13 and how the displacement of this lever can be limited by a first catch 19 which determines the flow state of the warm water and by a second catch 20 that determines the flow state of the cold water as a result of the presence of these catches the user only has to displace the lever 13 to one or the other end of the path available to it in order to transfer from one flow state to the other without having to check the position of the lever in addition fig7 shows that the lever 13 can be provided with a conical cuff 18 which is screwed on in an adjustable position and which is intended for interaction with the second catch 20 in order to modify the position of the end of the path of the lever 13 which determines the flow of the cold water in this way the cuff 18 is actually a part of the second catch of the device by adjusting the position of the cuff 18 the user can set the temperature at which the cold water is added and he can do this before starting to shower without having to concern himself with.