I’m installing a RO system for my friend and I have found that the pressure at the kitchen sink for feed water to be 35-40 psi but the pressure tank is reading 60psi, when I investigated a little more something just looked odd to me when the well line enters the house and pressure tank in relation to where it goes onto the rest of the house. Hopefully the picture can be seen otherwise it will be difficult to explain my friends set-up. After leaving the pressure tank area the water line goes through the meter, a whole house filter and then a water softener before moving on to the kitchen sink. My main concern at the moment is the pressure tank area .