Most jet pumps have a pressure switch to regulate cut in/ cut off pressure. Normally 40/60 psi. The pressure switch should be located at the rear of the pump where the wiring enters. First disconnect the power supply to the pump. Remove the cap where the wiring enters. On the inside of the cap there should be a diagram showing how to alter the cut in/ cut off pressure.
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Most jet pumps have a pressure switch to regulate cut in/ cut off pressure. Normally 40/60 psi. The pressure switch should be located at the rear of the pump where the wiring enters. First disconnect the power supply to the pump. Remove the cap where the wiring enters. On the inside of the cap there should be a diagram showing how to alter the cut in/ cut off pressure.