My pressure is at 57 lbs which just happens to be the max pressure of my waterline on my sink. If you use the self tapping component to tap into your waterline, it will make the hole bigger the deeper you tap until you reach the max size. If you go a few turn and back off, you can see the pressure (You need an inline pressure guage as included on the Typhoon III). Just keep adding a 1/4 turn and backing off until you either get the pressure you want or the hole is the maximum size and you have the highest pressure available.