While talking in general, the pressure of a pool pump is a number which is relative, and not a fixed one. The first time when the pump is installed, that reading can be considered as the pressure of the gauge for further reference. The filter gauge reading might vary for different machines. Still we can consider 10 psi as somewhere near normal, as most of the filters work around 5 to 10 or 10 to 20 psi range. With the correct pressure the cleaning and filtering of the pool can be done properly. Note the first reading of your filter and refer to it every time.