Jfharper
Member
Just replaced a pressure switch and pressure tank (I have two pressure tanks) and set the switch to 40/60 and the tanks to 38psi each with tanks empty. When I turned everything back on and after first fill up, I watched the pressure drop (after a number of minutes) slowly to 42 then the pressure would jump to 38 and the booster pump would kick on. Is this normal? I was wondering if either my water pressure or air gauge is off. Is the water pressure not supposed to make this sudden drop before switching the booster pump on?