be adjusted in this way the level of stability of the device can be adjusted fig3 and 4 show two additional embodiments of the device according to the invention in these parts identical to the parts of the first embodiment or corresponding to them have been denoted with the same reference numerals the embodiment according to fig3 only differs from the previously described embodiment in that the recuperating spring 17 is disposed around the cylinder 12 instead of being inserted into the cylinder 12 and acting against the second end 11 of the piston 8 and that it acts on the end plate 2 of the body 1 and one shoulder 20 of the piston in the embodiment according to fig4 the recuperating spring 17 is again disposed around the cylinder 12 however in this case it acts on the end plate 2 of the body 1 and the flange 18 of the cylinder 8 furthermore fig4 shows a simplification of the design of the cylinder 8 according to which the element 11 that forms the second end and the flange 18 may be configured as one single piece as is apparent from the above description the invention enables the implementation of a device for dynamic water flow regulation which device is practically not sensitive to fluctuations in the cold water inflow pressure the flow of which it regulates in order to send it into a thermostatic mixer to stabilize the function of the same as a result it is no longer required to adjust the load of the recuperating spring as a function of the inflow pressure present inside the fixture and furthermore no defect whatsoever can be observed in the functioning of the device even if for whatever.