Why use a Pump Controller?
Running a pump until the cut off switch automatically stops the pump means it constantly runs at maximum capacity. This can put unnecessary strain on pipes, hoses, fittings and the pump itself. This additional stress increases the chance of split hoses and leaking joints as well as shortening the life of your pump.
Also, as the pressure cut off switch engages it does so while drawing the maximum current from the battery. The high load at the contact points in the switch are likely to spark and arc producing additional wear and tear. The pump also runs at a higher temperature under these conditions which adversely effects the efficiency of the pump.
Without restricting the flow of water, the pump will always operate at full pressure. Good for putting out fires, but not so good for cleaning windows. A flow controller with dead end detection properly calibrated will arrest the pump before it reaches maximum pressure, improving battery life and power consumption.
The aim should be to work with the minimum supply of pure water to operate efficiently. Conserving water in this way ensures the most productive results, saving time and money.