Standard pump system
In a standard pumping system, a pressure switch controls the water pump. When the pressure drops to a certain level, typically around 30 psi the pump turns on. It continues pumping until the pressure reaches typically 50 psi at which point it shuts off. Water pressure fluctuates between these two levels during operation.
Constant Pressure System:
constant pressure system relies on a pressure sensor for control. When the pressure drops by only 5 psi, the system activates the pump. This system is less likely to cause fluctuation in water pressure and supplies a more consistent pressure.