to it by a screw 17 the seals 18 for example o rings ensure a sealing of the regulating element 4 against the housing and or against the water outlet the seals 19 which surround the water supplies 2 and 3 ensure that when the regulating elements 4 are in the zero position no water can enter the regulating element by means of a corresponding angle adjustment of the holes 20 one can program the mixture of hot and cold water the pin 21 with its associated spring 22 together with the recess 23 in the water outlet 5 limit the pivot range by means of corresponding detents which are engaged by the pin 21 under the load of the spring 22 one can achieve in simple fashion spot positioning naturally this type of location is only to be seen schematically as there are numerous possibilities of achieving this function by other practical solutions the embodiment example in fig4 shows how drastically simplified a mixer unit according to the invention can appear fig5 shows another variant of the water mixer unit according to the invention shown schematically in which the same parts are identified by the same index numbers additionally in this embodiment example a further regulating element 9 is available which is rigidly attached to the hand grips 8 by the screw 24 the pre settable regulating element 9 is mounted in regulating element 4 and has holes 25 which depending on angular position cover more or less the holes 20 in the regulating element 4 in this fashion by means of corresponding angular adjustment of the holes 20 and 25 the average ratio.