Keeping between these pressures will bring the best performance out of your shower cabin. Any less and you will see a deterioration in the performance and the hydro-jets, monsoon head and hand shower. 

Higher than the recommended could cause damage to the unit and some of the components.

Top Tip: Use a BAR pressure gauge where the shower will be situated to read the pressure that you have in your home. If you are employing a third party to install your shower, a pressure gauge is standard equipment that they will have in the van.