The switch is to far from the pressure tank. The switch needs to be on the line that enters the pressure tank. The snubber is a bad band aid that would not have been needed, if the switch were in the correct location. The lever on the side of the old switch is a low pressure cut off. This is used to shut the pump off, if you pump the well dry. If you have ever had to push up that lever to get water back to working, it had saved your pump. The new switch will not be able to save the pump if the well runs dry.